EW780-9500-001.9GHz Digital Modulation Cordless Headset

1 USER MANUAL Headset (DECT Headset phone) Model : OOMA-HDST01 2 IMPORTANT SAFETY INSTRUCTION : When using your telephone equipment, basic safety precautions should always be followed to reduce the risk of fire, electric shock and injury, including the following: 1) Read and understand all the instructions. 2) Follow all warnings and instructions marked on the product. 3) Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning. 4) Do not use this product near water (for example, near a bath tub, kitchen sink, swimming pool). 5) Do not overload wall outlets and extension cords as this can result in the risk of fire or electric shock. 6) Unplug this product from the wall outlet and refer servicing to Vtech under the following conditions:  When the power supply cord or plug is damaged or frayed.  If the product does not operate normally by following the operating instructions.  If the product has been dropped and the cabinet has been damaged.  If the product exhibits a distinct change in performance. 7) Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning. 8) Do not use the telephone to report a gas leak in the vicinity of the leak. SAVE THESE INSTRUCTIONS Caution for Rechargeable battery : 1) The Headset is equipped with Li-ion battery. You can replace it by buying the same battery type from the retailer. Do not disassemble the battery pack. 2) The use of other battery types or non-rechargeable batteries/primary cells can be dangerous. These may cause interference and/or unit damages. The manufacturer will not be held liable for damage arising from such non-compliance. 3) Do not use third party charging bays. The batteries may be damaged. 4) Do not immerse the unit in water and do not place in fire. 5) Risk of explosion if you replace the battery by an incorrect type. 6) Dispose of the unit with Li-ion battery enclosed according to the instruction. Must be disposed of at the point of sale or at the appropriate collection points provided by the public waste authorities. Package contents The package contains the following items: • 1 Headset unit • 1 Charger pod • 1 AC power adapter • 1 User manual • 6 Ear buds • 2 Ear hooks • 1 Head band • 1 Neck band The maximum range between the base station and the Headset is approximately 300 meters. Depending on the surrounding conditions as well as spatial and structural factors, the range may be reduced. The range indoors is normally less than outdoors. 3 1 INSTALLING YOUR HEADSET WITH A DECT PHONE First to power up your Dect phone used at home. Then power up the Headset. Do the registration procedure with the Dect phone. Pls use only the provided adaptor connected to the charger base. Important : Charging the Headset unit for at least 5 hours before use. Power adaptor information for the Headset : Manufacturer : Tenpao Model : S005IU0600040, Input 100-120V AC 60Hz 150mA, Output 6VDC 400mA Manufacturer : CHOU SEN ELECTRONICS (SZ) CO., LTD. Model : CS2A060040LUF, Input 100-120V AC 60Hz 200mA, Output 6VDC 400mA Battery installed in the unit : Manfacturer : BYD Type : Lithium-ion polymer rechargeable battery Model : BT191665 Capacity : 3.7V, 240 mAh, 0.888 Wh Charger Pod Charging pins. 4 Start to know your Headset : 1. Front side : 2. Top side : 1 TALK ON/OFF In idle mode: Press to place a call. During a call: Press to end the call. In idle mode: Press and hold about 4s to power the headset on or off. 2 SLIDER During a call: Slide to Volume + position, increase the earpiece volume. Slide to Volume - position, decrease the earpiece volume. In idle mode : Slide to Volume + position, increase the ringer volume. Slide to Volume - position, decrease the ringer volume. 3 MUTE/FLASH During a call: Press the slider once to mute the microphone. Press once again to unmute. Press and hold the slider for 2 seconds to do a Flash (R) function to answer a second incoming call. Talk On/Off button with LED indicator. Microphone in the bottom 1 2 3 5 2. Talk On/Off LED Indicator functions : The status LED on the Talk On/Off key can communicate information about the connection and battery status of the device. The table below shows the different LED indicator patterns of the headset uses : Blue light : 1. Steadily on: When the Headset is placed on the charge pod and fully charged. 2. Flashing : in idle mode and not charging. 3 .Double flashing : it is on and connected a phone call. 4. Trible flashing : it is power on. 5. Quadruple flashing : a call is coming, the headset is ringing, you can hear the ringer sound through the earpiece. Red light: 1. Steadily on: it is charging on the charging cradle. 2. Flashing : Battery is low and it needs to place it back to cradle for charging. 3. Triple flashing: it is powering off. Red/Blue light : 1. Toggling slowly : The unit is in registration mode but not registered. 2. Toggling quickly : it is in registration mode and trying to register to the base. Off : Headset is power off or no battery is installed or the battery is dead Registration to a base unit : The headset is un-registered when taking out from the box. Power up the headset by placing it on the charger pod which is connected to the charger adaptor and power on. The power indicator is flashing with blue and red color alternatively. Then start the registration mode of the base unit. For the Ooma base unit, press and hold the page key of the Ooma for 3 seconds to start registration mode. Wait until a succeed tone is heard. The power indicator on the headset will be stable and in red color. Note: To register the headset unit, the system PIN of the Dect phone base should be 0000. Or else, the registration will be failed. Remark : 1. It will hear the voice message from the headset in below 3 events :  Battery low  Out of range  Not Registered 2. Place the unit on the charger bay after use it to make sure t…

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Appendix B1 Letter of Agency for FCC Certification November 18, 2013 To whom it may concern, Letter of Agency I, an officer of VTech Telecommunications Limited do hereby authorize Intertek Testing Services (Mr. Ken Sit/ Mr. Melvin Nip) to act on our behalf in front of the Federal Communications Commission with respect to all matters relating to certification of equipment under Part 15 and/or Part 95 of the FCC Rules until further notice. I further certify that no party (as defined in §1.2002(b) of CFR 47, 2004) to this application, including myself, is subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C., 862. Regards, Michael Tsui Approbation Supervisor

VTech Telecommunications Ltd November 18, 2013 To whom it may concern, Label Location Justification FCC ID: EW780-9500-00 Request is hereby submitted by VTech Telecommunications Ltd. to request an alternative method of positively identifying the equipment, pursuant to 47 CFR § 2.925(f) of the FCC Rules. The FCC identifier for handset will be placed in the battery compartment and the following requirements are confirmed to meet: a) The FCC identifier will visible at the time of purchase, by either of the following approaches: • Marketing the device without the battery installed, or • Providing instruction (stated on the box, user manual, or additional documentation) directing the user as to where to find the FCC label. b) The user accessible area will not require any special tools for access and the FCC label will not be placed on a removable part. The user manual has already included the FCC statements, pursuant to 47 CFR § 15.19(a)(3), 15.21 and 15.105(b). If you have questions or need further information, please contact the undersigned. Sincerely, Michael Tsui Approbation Supervisor

VTech Telecommunications Ltd November 18, 2013 To whom it may concern, Request for Permanent Confidentiality Under FCC Part 15 Certification FCC ID: EW780-9500-00 Request is hereby submitted by VTech Telecommunications Ltd. to withhold permanently from public review certain portions of the application for equipment certification for the referenced FCC identifiers. This request for confidentiality is made pursuant to 47 CFR § 0.457(d) and 0.459 of the FCC Rules. In particular, the following sections of the application are to be kept permanently confidential and VTech Telecommunications Ltd. reserves the right to discern which parties can obtain access to these information: • Schematics • Detailed Block diagrams • Detailed Operational/Functional Description The rationale for request for confidentiality is as followings: This information represents intellectual property of VTech Telecommunications Ltd . and it is subject to competition. We have invested considerable time and materials in research and development to produce the referenced product. Disclosure of the permanently confidential portions of this application to competitors would not only give them significant competitive advantages in developing similar products, but would also disclose successful implementation of unpublished, leading edge technology developed by us. If you have questions or need further information, please contact the undersigned. Regards, Michael Tsui Approbation Supervisor

INTERTEK TESTING SERVICES External Photos FCC ID: EW780-9500-00 IC: 1135B-80950000 external photos - 1 of 2 HK13110373 Job Number HK13110373 Job Number INTERTEK TESTING SERVICES External Photos FCC ID: EW780-9500-00 IC: 1135B-80950000 external photos - 2 of 2 HK13110373 Job Number

Taihoon Kim | 26. Jul. 2013 | Revision 3.0CSP | OOMA-HDST01 | Headset illustration scale 50% Taihoon Kim | 01. Aug. 2013 | Revision 4.0CSP | OOMA-HDST01 | Charger Model: OOMA-HDST01 ® P/N: 160-0121-100 S/N:VS1345D60001 MADE IN CHINA FCC ID: EW780-9500-00 IC: 1135B-80950000 Model: OOMA-HDST01 ® P/N: 160-0121-100 INPUT: DC6V 400mA VS1345D60001 MADE IN CHINA 14.0mm 20.0mm

INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-9500-00 IC: 1135B-80950000 internal photos - 1 of 4 Headset assembly (View 1) Headset assembly (View 2) INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-9500-00 IC: 1135B-80950000 internal photos - 2 of 4 Headset Main PCB comp side Headset Main PCB solder side (View 1) INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-9500-00 IC: 1135B-80950000 internal photos - 3 of 4 Headset Main PCB solder side (View 2) Headset Antenna (View 1) INTERTEK TESTING SERVICES Internal photos FCC ID: EW780-9500-00 IC: 1135B-80950000 internal photos - 4 of 4 Headset Antenna (View 2) Headset Oscillator PCB comp side

INTERTEK TESTING SERVICES FCC ID: EW780-9500-00 RF exposure - 1 of 1 For Standalone SAR test exclusion consideration, when the corresponding SAR Exclusion Threshold requirement in KDB 447498 is satisfied, standalone SAR evaluation for general population exposure conditions, by measurement or numerical simulation is not required. Description the tested model: OOMA-HDST01 EUT Description : 1.9GHz DECT 6.0 Cordless Headset Model : OOMA-HDST01 Operating Configuration(s) : Next to ear Operating mode (s) : Voice call Device Category : Portable Device Tx Frequency : 1921.536 – 1928.448 MHz Production tolerance : 16 dBm (Minimum) to 21 dBm (Maximum) Antenna gain : 0 dBi = 1.00 (num gain) Maximum source-based time- averaging duty factor : 4.2% = (1/24 x100%) Minimum separation distance : 5 mm Applicable FCC KDB : FCC KDB 447498 D01 FCC KDB 865664 D02 From above data, the source-based time-averaging output power is as follow: The Maximum Conducted Power = 21 dBm = 125.9 mW The Maximum conducted Power source-based time-averaging output power = (125.9 * 0.042) mW = 5.29 mW In the frequency range of 100MHz to 6GHz and test separation distance ≤ 50mm, the SAR Exclusion Threshold will be determined as follow, The SAR exclusion threshold = () )(/0.3GHzFTD× = 10.80 mW where TD = 5 mm and F(GHz) = 1.928 GHz Conclusion Since the calculated conducted source-based time-averaged output power is 5.29 mW, which is less than the SAR Exclusion Threshold at 5mm test separation distance 10.80 mW for general population and uncontrolled exposure, standalone SAR evaluation for general population exposure conditions, by measurement or numerical simulation is not required.

Issuing Laboratory: Intertek Testing Services Hong Kong Limited Hong Kong Accreditation Service (HKAS) has accredited this laboratory under the Hong Kong Laboratory Accreditation Scheme (HOKLAS) for specific laboratory activities as listed in the HOKLAS directory of accredited laboratories. The results shown in this report were determined by this laboratory in accordance with its terms of accreditation. Test Report Number: 13110373HKG-001 Page 1 of 56 FCC ID: EW780-9500-00 IC: 1135B-80950000 Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Tel: (852) 2173 8888 Fax: (852) 2785 5487 Website: www.hk.intertek-etlsemko.com GENERAL INFORMATION Applicant Name: VTech Telecommunications Ltd. Applicant Address: 23/F, Tai Ping Industrial Centre, Block 1, 57 Ting Kok Road, Tai Po, Hong Kong. FCC Specification Standard: FCC Part 15, October 1, 2012 Edition FCC ID: EW780-9500-00 FCC Model(s): OOMA-HDST01 IC Specification Standard: RSS-213 Issue 2, December 2005 RSS-Gen Issue 3, December 2010 IC: 1135B-80950000 IC Model(s): OOMA-HDST01 Type of EUT: Unlicensed Personal Communications Service Devices Description of EUT: 1.9GHz Digital Modulation Cordless Headset Serial Number: N/A Sample Receipt Date: November 11, 2013 Date of Test: November 15, 2013 to November 19, 2013 Report Date: December 10, 2013 Environmental Conditions: Temperature: +10 to 40°C Humidity: 10 to 90% Issuing Laboratory: Intertek Testing Services Hong Kong Limited Hong Kong Accreditation Service (HKAS) has accredited this laboratory under the Hong Kong Laboratory Accreditation Scheme (HOKLAS) for specific laboratory activities as listed in the HOKLAS directory of accredited laboratories. The results shown in this report were determined by this laboratory in accordance with its terms of accreditation. Test Report Number: 13110373HKG-001 Page 2 of 56 FCC ID: EW780-9500-00 IC: 1135B-80950000 Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Tel: (852) 2173 8888 Fax: (852) 2785 5487 Website: www.hk.intertek-etlsemko.com Table of Contents 1.0 Test Results Summary & Statement of Compliance......................................... 5 1.1 Summary of Test Results .................................................................................. 5 1.2 Statement of Compliance .................................................................................. 6 2.0 General Description............................................................................................ 8 2.1 Product Description ............................................................................................ 8 2.2 Technical Description ......................................................................................... 8 2.3 Test Methodology............................................................................................... 8 2.4 Test Facility........................................................................................................ 8 3.0 System Test Configuration............................................................................... 10 3.1 Justification ...................................................................................................... 10 3.2 Conducted Emission Test Configuration ........................................................... 11 3.3 Conducted Monitoring and Operational Test Configuration ............................... 11 3.4 EUT Exercising Software.................................................................................. 11 3.5 Details of EUT and Description of Accessories................................................. 12 3.6 Measurement Uncertainty ................................................................................ 12 4.0 Measurement Results....................................................................................... 14 4.1 Antenna Requirement...................................................................................... 14 4.2 Digital Modulation Techniques.......................................................................... 14 4.3 Emission Bandwidth......................................................................................... 15 4.4 Directional Gain of the Antenna ........................................................................ 18 4.5 Peak Transmit Power ....................................................................................... 19 4.6 Power Spectral Density .................................................................................... 22 4.7 Automatic Discontinuation of Transmission....................................................... 25 4.8 Unwanted Emission Inside the Sub-Band ......................................................... 26 4.9 Emissions Outside the Sub-Band ..................................................................... 30 4.9.1 Radiated Emissions Configuration Photographs ............................................ 31 4.9.2 Radiated Emissions Data .............................................................................. 31 4.9.3 Field Strength Calculation.............................................................................. 35 4.9.4 Average Factor Calculation and Transmitter ON Time Measurements ........... 36 4.10 Frame Repetition Stability ............................................................................. 37 4.11 Frame Period and Jitter ................................................................................. 38 4.12 Carrier Frequency Stability............................................................................. 39 4.13 Monitoring Threshold...................................................................................... 39 4.13.1 Lower Monitoring Threshold ........................................................................ 41 4.13.2 Least Interfered Channel.......................................................................…

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VTech Telecommunications Ltd November 18, 2013 To whom it may concern, Declarations FCC ID: EW780-9500-00 IC: 1138B-80950000 I, the undersigned, hereby declare that 1. The device does not use the provisions of 47CFR 15.323 (c) (6), random waiting mechanism is not used in this system. 2. The provisions of 47CFR 15.323 (c) (10) and 47CFR 15.323 (c) (11) are not used to extend the range of spectrum occupied over space or time for the purpose of denying fair access to spectrum to other devices. 3. Only the cordless Headset initiating device, which will initiate the establishment of the duplex connection. 4. The device complies with the provisions of 47CFR 15.319(f). The device shall automatically discontinue transmission in case of either absence of information to transmit or operational failure. These provisions are not intended to preclude transmission of control and signaling information or use of repetitive codes used by certain digital technologies to complete frame or burst intervals. The following table explains the reaction of device in case of either absence of information to transmit or operational failure after a connection of its companion device is established. Circumstances Reaction of cordless Headset 1 Switch-off companion device NA 2 On hook by companion device NA 3 Remove power from companion device A 4 Switch-off device NA 5 On hook device C 6 Remove power from device C A – Connection is terminated and, transmission ceases. B – Connection is terminated but device transmits control or signaling information. C – Connection is terminated but companion device transmits control or signaling information. NA – Not applicable represents the device does not contain a hook switch or a power off switch. The upper threshold limit by the manufacturer is - 60.9dBm If you have questions or need further information, please contact the undersigned. Regards, Michael Tsui Approbation Supervisor

INTERTEK TESTING SERVICES The Worst Case Configuration Photographs - Mode: Transmission FCC ID: EW780-9500-00 IC: 1135B-80950000 config photos (radiated emission) - 1 of 1 Radiated Emission Front View Rear View