2ASYY-GS888Ccombo smoke & co alarm

1) The TEST/SILENCE button accurately tests the device functions. Do not use any other test method. Test the device weekly to ensure proper operation. Do not install in non- residential buildings. And the device is not a substitute for a complete alarm system. 2) If you're sure it isn't a real alarm, open windows or fan the air around the device to silence it. 3) Observe and follow all local and national electrical and building codes for installation. 4) This Combo Smoke & CO alarm is designed to be used inside a single family only. In multifamily buildings, each individual living unit should have its own smoke alarm devices. Do not install in non-residential buildings. The device is not a substitute for a complete alarm system. 5) Install a Combo Smoke/CO alarm in every room and o n every level of the home. Smoke may not reach the smoke alarm for many reasons. For example, if a fire starts in a remote part of the home, on another level, in a chimney, wall, roof, or on the other side of a closed door, smoke may not reach the device in time to alert household members. This Combo Smoke/CO alarm will not promptly detect a fire or CO danger except in the area or room in which it is installed. 6) This Combo Smoke/CO alarm may not alert every household member every time. The al a rm horn is loud in order to alert individuals to a potential danger. However, there may be some circumstances where a household member may not hear the alarm (i.e. outdoor or i ndoor noise, sound sleepers, drug or alcohol usage, the hard of hearing, etc.). If you suspect that this device may not alert a household member, should install and maintain other specialty smoke alarm or/and CO alarm devices. Household member must hear the alarm’s warning sound and quickly respond to it t o reduce the risk of damage, injury, or death that may result from fire. If a household member is hard of hearing, install other special smoke alarm or/and CO alarm with lights or vibrating devices to alert occupants. 7) This Combo Smoke/CO alarm can only sound their alarms when they detect smoke or detect combustion particles or dangerous level of CO in the air. They do not sense heat, flame, or other gas. The device is designed to give audible warning of a developing fire. However, many fires are f ast - burning, explosive, or intentional, and others are caused by carelessness or safety hazards. In this circs, Smoke may not remake the unit alarm QUICKLY ENOUGH to ensure safe escape. 8) This Combo Smoke/CO alarm have limitations. The device is not foolproof and is not warranted to protect lives or property from fire. Smoke alarm or/and CO alarm are not a substitute for insurance. Homeowners and renters should insure their lives and property. In addition, it is possible for the device to f ail at any time. For this reason, you must test the device weekly and replace every 10 years. The following suggestions are intended to help you with the placement and installation of your Combo Smoke/CO alarm. 1). Drilling two φ 5.0mm holes in the ceiling or wall, the distance between two holes cent er i 2). Attach the bracket to the plastic plugs and fix tightly the screws into the plastic plugs. Do NOT over-tighten screws. 3). Install and rotate the alarm body on the bracket. 4). Test the device by using the TEST/SILENCE button. Ensure the device sound is alarm pattern. Rotate clockwise for installation Rotate counter clockwise for un-installation The green indicator is used to indicate power status of the device. The green indicator will flash every 40 seconds. The yellow indicator is used to indicate malfunctions or low battery warning status of the device. The red indicator is used to indicate alarm status of the smoke alarm or CO alarm. The TEST/SILENCE button is used to test the device and to silence the unit during a Smoke alarm/carbon monoxide alarm. Press to keep it longer than 1s to enable TE ST function, or press to enable HUSHfunction. The sounder is used to send out smoke alarm, CO alarm warning and abnormal warning information. The device start-up after connecting the battery, with the green indicators will light up briefly and LCD screen full segment code display then countdown 60 seconds.After power on, 60 seconds before the POWER indicator (green) flash every 2 seconds. This is pre-heated state, 60 seconds later the POWER indicator (green) flashing every 40 seconds indicates the device is functioning properly. The POWER indicator (green) flashing every 40 seconds. The LCD doesn’t display. If the device chirps twice every 40 seconds, with FAULT indicator (yellow) will be flashing. It indicates the device is in a malfunctioning condition. If the word “Err” and flame symbol on the LCD screen is on, it means that your device does not have the function to detect smoke and is not responding to smoke. If the word “Err” and toxic symbol on the LCD screen is on, it means that your device does not have the function to detect CO and is not responding to CO. GREEN=POWER YELLOW=FAULT RED=ALARM LCD Display TEST/HUSH button Tricolor indicator Sounder 1. What to do if the smoke alarm sounds 2. What to do if the CO alarm sounds 3. Product important information 4. Installation instructions 5. Understanding your Combo Smoke/CO alarm 6. General maintenance 7. Carbon monoxide overview 8. Battery information 9. Product Specifications 10. Recognizing nuisance alarms 11. Good safety habits - develop and practice a plan of escape 12. Manufacturer and C The smoke alarm pattern is three long beeps, a 1.5 second pause, and three long beeps repeating. The ALARM indicator (red) will flash once a second. THE CARBON MONOXIDE (CO) ALARM PATTERN IS FOUR QUICK BEEPS, REPEATING EVERY 5 SECONDS. THE ALARM INDICATOR (RED) WILL FLASH THE SAME PATTERN. WARNING! –ACTUATION OF YOUR CO ALARM INDICATES THE PRESENCE OF CARBON MONOXIDE (CO) WHICH CAN KILL YOU. ustomer service information 14. 15 . W a rr a n t y I For ensure the Combo Smoke & CO Alarm work properly and provide detecti…

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Rev 1/26/2023 (Siterwell Electronics Co., Limited) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 06‐26‐2023 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2ASYY‐GS888C Siterwell Electronics Co., Limited certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, CynthiaXia/Certificate engineer Siterwell Electronics Co., Limited Rev 1/26/2023 (Siterwell Electronics Co., Limited) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 06‐26‐2023 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2ASYY‐GS888C Siterwell Electronics Co., Limited certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, CynthiaXia/Certificate engineer Siterwell Electronics Co., Limited

Siterwel No.666 Ningbo, Z China Date: 20 2 Federal C Authoriza 7435 Oa Columbi a FCC ID: US Siterwell Agent, LL Siterwell States fo and imp o related ad FCC US the desi g Electronic Designat Company FRN: 003 Address: Contact P Phone: 7 Email: Su Sincerely Company Company Signature l Electronic Qingfeng R Zhejiang 23.6.30 Communicat ation and Ev kland Mills R a, MD 21046 2ASYY-GS8 S Agen Electronics LC to accept Electronics r no less th a ortation of the dministrative Agent, LLC, gnated agent cs Co., Limit ted Agent In y Name: FCC 33402884 3722 Illinoi s Person: Tim 708-571-3148 upport@FCC y, y: Siterwell E y Represent e: cs Co., Limi Road, Jiang tions Comm valuation Div Road 6 888C t – Atte Co., Limited t service of p Co., Limited an one year a e applicable e or judicial p accepts as t for the purp ted for FCC nformation: C US Agent, s Avenue, Sa Payne 8 CUSAgent.co Electronics C ative:Cynthia ited gbei District mission vision station certifies, tha process on o accepts to m after either th equipment w proceeding in of the date o pose of acce ID: 2ASYY- G : , LLC aint Charles, om Co., Limited aXia t Statem at as of June our behalf for maintain an a he grantee h within the U. nvolving the of the filing o pting service GS888C , IL, 60174, U Designat Designat Signature ment / Pa e 30, 2023, w r FCC ID: 2A agent of serv has permane S., or the co equipment, of this applica e of process USA ted Agent: F ted Agent Re e: art 2.91 we have des ASYY-GS888 vice of proce ently termina onclusion of a whichever is ation, the ob on behalf o f CC US Agen epresentativ 1(d)(7) ignated FCC 8C ss in the Un ted all mark e any Commis s later. ligation of b e f Siterwell nt, LLC e: Tim Payn C US ited eting ssion- eing e

Rev 11/20/07 (Siterwell Electronics Co., Limited) Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2ASYY-GS888C Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram, Schematics, Operational Description Block Diagram.pdf, Schematics.pdf, Operation Description .pdf The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Pursuant to DA04-1705 June 15, 2004 of the Commission’s public notice, we also request temporary confidential treatment of information accompanying this application as outlined below: Short-term confidentiality requested: 180 days Exhibit Type File Name External Photos ,Internal Photos, Test Setup Photos, Manual External Photos.pdf, Internal Photos.pdf, Test Setup Photos .pdf, User Manual.pdf Sincerely, Cynthia Xia/Certificate engineer Siterwell Electronics Co., Limited

Difference Statement Model：GS888C, GS888C-C, GS888C-D The three models are only named differently, and the internal circuit boards are the same. We chose " GS888C " for RF testing June 26, 2023 CynthiaXia/Certificate engineer Siterwell Electronics Co., Limited

X:\2023\Siterwell(赛特威尔)\ENB2305310126W001(EDG2305310126E011)(GS888C、GS888C-C、GS888C-D)\2.Technical Document\TIMCO\POA.docx (Siterwell Electronics Co., Limited) Federal Communications Commission Authorization and Evaluation Division 1435 Oakland Mills Road Columbia, MD 21046 Date: June 26, 2023 SUBJECT: FCC Application for FCC ID: 2ASYY-GS888C To Whom It May Concern: We, the undersigned, hereby authorize Sam Lv at EMTEK(DONGGUAN) CO., LTD. on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by EMTEK(DONGGUAN) CO., LTD. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, CynthiaXia/Certificate engineer Siterwell Electronics Co., Limited

Siterwell Electronics Co., Limited Date: 2023-06-26 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD FCC ID: 2ASYY-GS888C To Whom It May Concern: This letter is to ascertain that Siterwell Electronics Co., Limited EUT : combo smoke & co alarm Model Name : GS888C, GS888C-C,GS888C-D We will apply for FCC SDOC. If you have any question or concerns, pls. contact us. Sincerely, Client’s signature ： Client’s name / title ： CynthiaXia/Certificate engineer Contact information / address: Siterwell Electronics Co., Limited /No.666 Qingfeng Road, Jiangbei District, Ningbo, Zhejiang Province,China.

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FCC ID: 2ASYY-GS888C RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density(mW/cm 2 ) Average Time (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R 2 ) Where Pd= Power density in mW/cm 2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1416 R= distance between observation point and center of the radiator in cm Pd the limit of MPE,1mW/cm 2 . If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. mW = 10^( dBm/10) 11.2 Measurement Result Operation Frequency: 915.3 MHz Antenna gain: -5.52 dBi; EIRP=E+20log(d)-104.7=88.12+9.54-104.7=-7.04 dBm Channel Freq. (MHz) modulation Measured power (dBm) Tune-up power (dBm) Max tune-up power (dBm) Antenna Gain Numeric Evaluation result (mW/cm2) Power density Limits (mW/cm2 ) 915.3 FSK -7.04 -7±1 -6.0 0.28 0.000014019 0.61 *** End of Report ***

Formno.:B&T-qr-en-002version:B3 Page1of8 ProjectNo.：Y230209251 ProjectNo.：2023.06.21 REV：A1 AntennaSPEC Customername：SITERWELLELECTRONICSCO.,LIMITE Customerproject：GS888C B&TP/N：79070003 Spec.：built-inantenna-915.3MHz-spring-￠0.4×OD4.6×N9×L18.82mm Sealedbycorporation: compilation verifyapproval HuangfeihuiZhangshiyangLiulihua Sealedbycustomer： checkverifyapproval ContactinformationofB&T: Contactpersonforsales ： Xiaozhang MB:18356833061E-mail ： [email protected] Contactpersonfor technical: Zhangshiyang MB:15765524719E-mail ： [email protected] ContactpersonforQuality: Leihao MB:15681917991E-mail ： [email protected] Address:No.666QingfengRoad,JiangbeiDistrict,Ningbo,ZhejiangProvince,China Documentmaking/revising/abolishingresume Formno.:B&T-qr-en-002version:B3 Page2of8 EditionDateFormulate/Revisedcontent Formulate approval A02023.05.15Forthefirsttime,formulate Huangfeihui Zhangshiyang/Liulihua A12023.06.21 Updateprojectname,electricaltest reportupdateelectricaltestreportand specificationdescription Huangfeihui Zhangshiyang/Liulihua Contents Formno.:B&T-qr-en-002version:B3 Page3of8 1、Cover·······································································1 2、Indexofspecification···················································3 3、Productdrawing···························································4 4、Electrical&mechanicsParameter·····································5 5、Electricaltestreport·····················································6 6、TableofMaterialsandHazardousSubstances························7 7、PackingSpecification·····················································8 3 、 Productdrawing Formno.:B&T-qr-en-002version:B3 Page4of8 ElectricalParameter Formno.:B&T-qr-en-002version:B3 Page5of8 4、Properties&parameter 5、Electricaltestreport S11 FreqRange 915.3MHz CharacteristicImpedance 50 Ω VSWR sampleofreferenceproject TheMaxinputpower <10w Polarizationmode Polarlinearization RadiationmodeOmnidirectional Antennastyle Spring MechanicsProperties Length18.82±0.5mm Saltspraytest/ Environmentparameter OperatingTemp -30 °C ~65 °C Formno.:B&T-qr-en-002version:B3 Page6of8 ElectricalPerformanceTestParameterTable Freq/MHz915.3MHz VSWR2.64 Gain&efficiency  Directiondiagram 915.3M3D-E1-E2-H

Report No.EDG2305310126E01101R Page 1 of 28 Ver.1.0 TEST REPORT Product Name : combo smoke & co alarm Model Number : GS888C, GS888C-C, GS888C-D FCC ID : 2ASYY-GS888C $二维码$ Prepared for : Siterwell Electronics Co., Limited Address : No.666 Qingfeng Road, Jiangbei District, Ningbo, Zhejiang Province, China. Prepared by : EMTEK (DONGGUAN) CO., LTD. Address : -1&2F., Building 2, Zone A, Zhongda Marine Biotechnology Research and Development Base, No. 9, Xincheng Avenue, Songshanhu High-technology Industrial Development Zone, Dongguan, Guangdong, China Tel : +86-0769-22807078 Fax: +86-0769-22807079 Report Number : EDG2305310126E01101R Date(s) of Tests : May 31, 2023 to June 19, 2023 Date of Issue : June 21, 2023 Report No.EDG2305310126E01101R Page 2 of 28 Ver.1.0 Table of Contents 1 TEST RESULT CERTIFICATION ......................................................................................................................... 3 2 EUT TECHNICAL DESCRIPTION ....................................................................................................................... 5 3 SUMMARY OF TEST RESULT ............................................................................................................................ 6 4 TEST METHODOLOGY ....................................................................................................................................... 7 4.1 GENERAL DESCRIPTION OF APPLIED STANDARDS .................................................................................... 7 4.2 MEASUREMENT EQUIPMENT USED.............................................................................................................. 7 4.3 DESCRIPTION OF TEST MODES ..................................................................................................................... 8 4.4 TEST SOFTWARE ............................................................................................................................................. 8 5 FACILITIES AND ACCREDITATIONS ................................................................................................................. 9 5.1 FACILITIES ......................................................................................................................................................... 9 5.2 LABORATORY ACCREDITATIONS AND LISTINGS .......................................................................................... 9 6 TEST SYSTEM UNCERTAINTY ........................................................................................................................ 10 7 SETUP OF EQUIPMENT UNDER TEST ........................................................................................................... 11 7.1 RADIO FREQUENCY TEST SETUP 1 ............................................................................................................. 11 7.2 RADIO FREQUENCY TEST SETUP 2 ............................................................................................................. 11 7.3 CONDUCTED EMISSION TEST SETUP ......................................................................................................... 13 7.4 SUPPORT EQUIPMENT .................................................................................................................................. 13 8 TEST REQUIREMENTS .................................................................................................................................... 14 8.1 BANDWIDTH TEST .......................................................................................................................................... 14 8.2 RADIATED SPURIOUS EMISSION ................................................................................................................. 16 8.3 CONDUCTED EMISSIONS TEST .................................................................................................................... 26 8.4 ANTENNA APPLICATION ................................................................................................................................ 27 Report No.EDG2305310126E01101R Page 3 of 28 Ver.1.0 1 TEST RESULT CERTIFICATION Applicant : Siterwell Electronics Co., Limited Address : No.666 Qingfeng Road, Jiangbei District, Ningbo, Zhejiang Province, China. Manufacturer : Siterwell Electronics Co., Limited Address : No.666 Qingfeng Road, Jiangbei District, Ningbo, Zhejiang Province, China. EUT : combo smoke & co alarm Model Name : GS888C, GS888C-C, GS888C-D Trademark : N/A Measurement Procedure Used: APPLICABLE STANDARDS STANDARD TEST RESULT FCC 47 CFR Part 2, Subpart J FCC 47 CFR Part 15, Subpart C PASS The above equipment was tested by EMTEK (DONGGUNA) CO., LTD. The test data, data evaluation, test procedures, and equipment configurations shown in this report were made in accordance with the procedures given in ANSI C63.10 (2013) and the energy emitted by the sample EUT tested as described in this report is in compliance with the requirements of FCC Rules Part 2 and Part 15.249 The test results of this report relate only to the tested sample identified in this report. Date of Test : May 13, 2023 to June 19, 2023 Prepared by : Warren deng /Engineer Reviewer : Tim Dong /Supervisor Approved & Authorized Signer : Sam Lv /Manager Report No.EDG2305310126E01101R Page 4 of 28 Ver.1.0 Modified History Version Report No. Revision Date Summary / EDG2305310126E01101R / Original Report Report No.EDG2305310126E01101R Page 5 of 28 Ver.1.0 2 EUT TECHNICAL DESCRIPTION Product: combo smoke & co alarm Model Number: GS888C, GS888C-C, GS888C-D (Note: The three models are only named differently. Everything else is the same. We chose " GS888C " for RF testing) Sample Number: EDG2305310126E011-1-1 Power Supply: DC 4.5V for Battery Test Voltage: DC 4.5V Modulation: FSK Frequency Range: 915.3 MHz Max Transmit Power: 88.12 dBuV/m Antenna: Spring Antenna Antenna Gain: -5.52 dBi Temperature Range: 4.4°C ~ 37.8°C Date of Receiver: May 31, 2023 Not…

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