2BTT9-86386V60DSpreader controller

86386 V60D Product Manual 1. Start/Stop the motor After the system is powered on, briefly press the 50% button on the keyfob once, and the motor will start at 50% power and begin to rotate and stabilize gradually. When the 100% button on the keyfob is pressed briefly, the motor will start at 50% power and ramp up to 100% power within 2 seconds. Pressing the stop button on the keyfob briefly will immediately stop the motor. 2. Switching Output power When the motor rotates at 50% power, briefly pressing the 100% button,the controller will increase the output power to 100% within 1 second. Similarly, when the motor rotates at 100% power, briefly pressing the 50% button, the controller will decrease the output power to 50% within 2 seconds. 3. Start the motor manually When the motor in a stopped state, connect the BYPASS terminal to the COMMON terminal on the controller, and the controller will output at 100% power to start the motor. If the motor was originally running at 50% power, it will switch to 100% power operation at this time. When the connection between BYPASS and COMMON terminals is disconnected, the controller immediately stops outputting power, and the motor stops running. During the connection or subsequent disconnectionandconnectionofBYPASSandCOMMON,thekeyfob withoutanyfunction.Whenthecontrollerisdisconnectedfromthe powersupplyandreconnected,thekeyfobfunctionwillberestored. 4.Learningcodeforkeyfob Whenthemotorinastoppedstate,connecttheLEARNterminalandthe COMMONterminalonthecontrollerfor2secondsandthendisconnect. TheLEDwillflashrapidly.Within30seconds,pressanybuttononthe keyfobtolearnthecode.IftheLEDflashesonce,meansthekeyfobhas beenlearncodesuccessfully.Waitfor30secondsorreconnectthe LEARNterminalandtheCOMMONterminalonthecontrollerduringthe 30-secondperiod,andthecodelearningprocesswillbecanceled. Similarly,youcanlearnupto3keyfoborlearn3keyfobconsecutively. Clearallpairedkeyfobcode:ConnecttheLEARNterminalandthe COMMONterminalonthecontrollerfor15seconds.OncetheLEDturns off,theclearingissuccessful. FCC warning statements: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The device has been evaluated to meet general RF exposure requirement.

Douglas Dynamics, LLC 11270 W Park Place,Suite 300 Milwaukee,WI 53224 Milwaukee United States of America Date: 12/26/2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BTT9-86386V60D FRN: 0037776648 US Agent – Attestation Statement / Part 2.911(d)(7) Douglas Dynamics, LLC certifies, that as of [12/26/2025], we have designated Douglas Dynamics, LLC to accept service of process on our behalf for FCC ID: 2BTT9-86386V60D Douglas Dynamics, LLC, accepts to maintain an agent of service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission- related administrative or judicial proceeding involving the equipment, whichever is later. Douglas Dynamics, LLC, accepts as of the date of the filing of this application, the obligation of being the designated agent for the purpose of accepting service of process on behalf of Douglas Dynamics, LLC for FCC ID: 2BTT9-86386V60D Designated Agent Information: Company Name: Douglas Dynamics, LLC FRN: 0037776648 Address: 11270 W Park Place,Suite 300 Milwaukee,WI 53224 Contact Person: Warren Luo Phone: 86-10-65973920 Email: [email protected] Sincerely, Company: Douglas Dynamics, LLC Address: 11270 W Park Place,Suite 300 Milwaukee,WI 53224 Designated Agent: Douglas Dynamics, LLC Company Representative: Warren Luo Designated Agent Representative: Warren Luo Signature: Email: [email protected] Tel: 86-10-65973920 Signature:

(Douglas Dynamics, LLC) (January 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: 2BTT9-86386V60D) [Douglas Dynamics, LLC] (“the applicant”) 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature): (Applicant printed name): Warren Luo (Douglas Dynamics, LLC) (January 5, 2026) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: 2BTT9-86386V60D) [Douglas Dynamics, LLC] (“the applicant”) 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, (Applicant signature): (Applicant printed name): Warren Luo

Douglas Dynamics, LLC (December 27, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Spreader controller / 86386 V60D # FCC ID: 2BTT9-86386V60D #) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (Schematics, Block diagram, Operation description) required to be submitted with this application be permanently withheld from public review. These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Please contact me if there is any information you may need. Sincerely, Signature: Name Warren Luo Position Development Engineer manager Company Name Douglas Dynamics, LLC Address 11270 W Park Place,Suite 300 Milwaukee,WI 53224 Tel 86-10-65973920 Fax 86-10-65973920 Email [email protected]

Douglas Dynamics, LLC (December 27, 2025) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen Alpha Product Testing Co., Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Signature: Name Warren Luo Position Development Engineer manager Company Name Douglas Dynamics, LLC Address 11270 W Park Place,Suite 300 Milwaukee,WI 53224 Tel 86-10-65973920 Fax 86-10-65973920 Email [email protected]

FCC ID: 2BTT9-86386V60D FCC ID: 2BTT9-86386V60D FCC ID: 2BTT9-86386V60D FCC ID: 2BTT9-86386V60D

1cm 0.5cm Label Location FCC ID: 2BTT9-86386V60D

FCC ID: 2BTT9-86386V60D FCC ID: 2BTT9-86386V60D FCC ID: 2BTT9-86386V60D FCC ID: 2BTT9-86386V60D TX ANT FCC ID: 2BTT9-86386V60D

FCC ID: 2BTT9-86386V60D RF Exposure evaluation According to 447498 D01 General RF Exposure Guidance v06 The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison eirp = pt x gt = (EXd) 2 /30 where: pt = transmitter output power in watts, gt = numeric gain of the transmitting antenna (unitless), E = electric field strength in V/m, --- 10 ((dBuV/m)/20) /10 6 d = measurement distance in meters (m)---3m So pt = (EXd) 2 /30 x gt For Worst case Mode: 433.99MHz Field strength =74.6 dBuV/m @3m Ant gain 0 dBi; so Ant numeric gain=1 So pt= {[10 (74.6/20) /10 6 x3] 2 /30x1} x 1000 mW =0.00865 mW So (0.00865mW/5mm) x √0.43399 GHz = 0.00075<3 Then SAR evaluation is not required

ALPHA's reports is using a digital certificate that is trusted on Adobe's official server. If there is no digital certificate or the digital certificate shows damaged in your report. Please do not accept the report. E-mail: [email protected] Tel: 4008300895 Website: http://www.a-lab.cn/certificate FCC TEST REPORT FCC ID: 2BTT9-86386V60D On Behalf of Douglas Dynamics, LLC Spreader controller Model No.: 86386 V60D Prepared for : Douglas Dynamics, LLC Address : 11270 W Park Place, Suite 300 Milwaukee, WI. 53224 Prepared By : Shenzhen Alpha Product Testing Co., Ltd. Address : Building i, No.2, Lixin Road, Fuyong Street, Bao’an District, 518103, Shenzhen, Guangdong, China Report Number : A2511164-C04-R01 Date of Receipt : November 24, 2025 Date of Test : November 24, 2025 – January 6, 2026 Date of Report : January 6, 2026 Version Number : V0 Result Pass Page 2 of 38 Report No.: A2511164-C04-R01 TABLE OF CONTENTS Description Page 1. General Information .................................................................................................................... 6 1.1. Description of Device (EUT) ...................................................................................................... 6 1.2. Accessories of Device (EUT) ..................................................................................................... 7 1.3. Tested Supporting System Details ............................................................................................. 7 1.4. Test Facility ................................................................................................................................ 7 2. Summary of Test ......................................................................................................................... 8 2.1. Summary of Test Result ............................................................................................................. 8 2.2. Block Diagram ........................................................................................................................... 8 2.3. Test Mode .................................................................................................................................. 9 2.4. Test Conditions .......................................................................................................................... 9 2.5. Measurement Uncertainty (95% confidence levels, k=2) .......................................................... 9 2.6. Test Equipment ........................................................................................................................ 10 3. Radiation Emission ...................................................................................................................13 3.1. Radiation Emission Limits(15.209&231) .................................................................................. 13 3.2. Test Setup ................................................................................................................................ 13 3.3. Test Procedure ......................................................................................................................... 14 3.4. Test Equipment Setting For emission test. .............................................................................. 14 3.5. Test Condition .......................................................................................................................... 15 3.6. Test Result ............................................................................................................................... 15 4. Power Line Conducted Emission ............................................................................................22 4.1. Conducted Emission Limits (15.209) ....................................................................................... 22 4.2. Test Setup ................................................................................................................................ 22 4.3. Test Procedure ......................................................................................................................... 22 4.4. Test Results ............................................................................................................................. 23 5. Occupied bandwidth .................................................................................................................24 5.1. Test Limit .................................................................................................................................. 24 5.2. Method of Measurement .......................................................................................................... 24 5.3. Test Setup ................................................................................................................................ 24 5.4. Test Results ............................................................................................................................. 24 6. Transmission Time ...................................................................................................................26 6.1. Test Limit .................................................................................................................................. 26 6.2. Method of Measurement .......................................................................................................... 26 6.3. Test Setup ................................................................................................................................ 26 6.4. Test Results ............................................................................................................................. 26 7. Antenna Requirement ...............................................................................................................28 7.1. Standard Requirement .........................................................................................…

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ITEM Model Name 433.72MHz433.92MHz434.12MHz433.72MHz433.92MHz434.12MHz -0.150-0.13-0.23-0.16-0.22 Max gain Polarization Impedance心 Type-of- Antenna Manufacture Address PCB Antenna(V60D) PCB Antenna Specification Document 3/F, Building 19, No.16, Chuangye Road, Torch Development Zone, Zhongshan City, Guangdong Province, China. 50 0hm PCB Antenna Guangdong Victor Electronics Co.,Ltd. Antenna Specification Document Horizontalvertical 0dBi Horizontal and vertical center frequency

FCC ID: 2BTT9-86386V60D 1.1. Photos of Radiated emission FCC ID: 2BTT9-86386V60D