2A33F-OPA-1Smart Junction Box / Smart Junction Box (480V version)

Model difference letter 2022.08.18 Dear Eurofins Reviewer, This is a new Application from TrolMaster Agro Instruments Co., Ltd. Model No.: OPA-1, OPB-1 Use OPA-1 for all tests.Only the model name is different. Thank you for your cooperation! Yours sincerely, Signatory: Name: Kasuen Chan Position: Manager Company Name: TrolMaster Agro Instruments Co., Ltd. Address: Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong Tel / Fax 852 90862755 / 852 90862755 E-Mail: [email protected]

TrolMaster Agro Instruments Co., Ltd Agent Authorization Letter 2022-08-18 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen Most Technology Service 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, Name: Kasuen Chan Position: Manager Company Name: TrolMaster Agro Instruments Co., Ltd. Address: Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong Tel / Fax 852 90862755 / 852 90862755 E-Mail: [email protected]

TrolMaster Agro Instruments Co., Ltd Long Term Confidentiality Request Letter 2022-08-18 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR (FCC ID: 2A33F-OPA-1) 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 - e.g. Block diagram - e.g. SCH - e.g. Operational Description required to be submitted with this application be permanently withheld from public review. The above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Name: Kasuen Chan Position: Manager Company Name: TrolMaster Agro Instruments Co., Ltd. Address: Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong Tel / Fax 852 90862755 / 852 90862755 E-Mail: [email protected]

Model No.: OPA-1 FRONT VIEW OF SAMPLE BACK VIEW OF SAMPLE Model No.: OPA-1 LEFT VIEW OF SAMPLE RIGHT VIEW OF SAMPLE Model No.: OPA-1 TOP VIEW OF SAMPLE BOTTOM VIEW OF SAMPLE

CONFORMS TO UL STD.60730 CERTIFIED TO CSA STD.C22.2#60730 SN026180904888 OPA-1 FCC ID2A33F-OPA-1

Model No.: OPA-1 Page 1 of 5 INTERNAL PHOTO OF SAMPLE INTERNAL PHOTO OF SAMPLE PCB Antenna Location Model No.: OPA-1 Page 2 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Antenna Location Model No.: OPA-1 Page 3 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: OPA-1 Page 4 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: OPA-1 Page 5 of 5 INTERNAL PHOTO OF SAMPLE PCB

承认日期： APPROVAL DATE 2022/7/12 朱其亮冯伟刚 卢冬梅谢浩琳包永健 拓 霸承认批准: SIGN IN FOR APPROVAL 零件承认 TESTED BY 研发审核 R&D CHECKED BY 批准 APPROVAL 拓 霸 （ 厦 门 ） 电 子 有 限 公 司 TROLMASTER(XIAMEN) ELECTRON CO., LTD. 供方全称: (SUPPLIER NAME) 東莞市昶蒙电子有限公司 零件描述: (DESCRIPTION FOR SUP.) 内置天线_IPEX一代接口_915M 供方信息: (SUPPLIER INFORMATION) 地址：东莞市长安镇振安东路433号1栋1618 室 电话：13925511731 承认书 FOR APPROVAL 供方资料作成: SIGN IN FOR RELEASE SPEC. 作成 Prepared BY 审查 CHECKED BY 批准 APPROVAL 黄军 零件料号: (PART NUMBER FOR TM) 5547000002 零件规格: (SPECIFICATION) 内置天线_IPEX一代接口_915M（昶蒙） 规格书&图纸版本： DRAWING VERSION V1.0 NO12345判定 139.0139.5///OK 34.9835.03///OK 25.5225.56///OK 1.121.11///OK 2OKOK///OK 3////// 4OKOK///OK 5OKOK///OK 符合技术规格书要求；供方检测报告电性能 依供方检测报 告 尺寸3卡尺 25.5±0.2mm 材质 依供应商材质 证明 依供应商材质证明符合规格书&图纸； 1.13同轴电缆 黑色 其它补充无 外观目视/限度样品 表面无脏污、划伤、折痕，连接器无氧化、发黑 等不良； 包装目视 包装需符合防压伤碰伤，防尘要求；外包装无破 损,外箱需有品名料号生产日期等标识，标识字 体正确清晰 依供应商包装 仕样 承认依据■部件规格书 □供方检验报告 □图纸 □外观标准 □标准样品或限度样品 □会议记录 □其它: 综合判定■合格 □不合格 □让步接收检验卢冬梅审批包永健 检验项目检验方法判定标准备注 1 尺寸1卡尺线长140±3mm 尺寸2卡尺35±0.2mm 尺寸4卡尺 线径φ1.13±0.1mm 2 PCS 部件承认报告 样品品名 内置天线_IPEX一代接 口_915M（昶蒙） 样 品料号5547000002图纸版次V1.0 厂 商名称 東莞市昶蒙电子有限公 司 检 验日期2022/7/12样品数量 样品料号5547000002 厂 商名称東莞市昶蒙电子有限公司检验日期2022/7/12样品数量2 PCS 图 纸版次V1.0 部件承认图片 样品品名内置天线_IPEX一代接口_915M（昶蒙）

Shenzhen Most Technology Service Co., Ltd. No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. TEST REPORT FCC Rules Part 15.231 Report Reference No. .....................: FCC ID.. .......................................... : MTWG2207145-H 2A33F-OPA-1 Compiled by ( position+printed name+signature) .. : File administrators Alisa Luo Supervised by ( position+printed name+signature) .. : Test Engineer Sunny Deng Approved by ( position+printed name+signature) .. : Manager Yvette Zhou Date of issue ..................................... : Aug.11, 2022 Representative Laboratory Name .: Shenzhen Most Technology Service Co., Ltd. Address ............................................ : No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. Applicant’s name ............................ : TrolMaster Agro Instruments Co., Ltd Address ............................................ : Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong. Test specification/ Standard ..........: 47 CFR Part 1.1307 47 CFR Part 2.1093 TRF Originator .................................. : Shenzhen Most Technology Service Co., Ltd. Shenzhen Most Technology Service Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Most Technology Service Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Most Technology Service Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Smart Junction Box / Smart Junction Box (480V version) Trade Mark ....................................... : TrolMaster Model/Type reference....................... : OPA-1 Listed Models .................................. : OPB-1 Modulation Type ............................... : LORA Operation Frequency ........................ : 915MHz Hardware version ............................. : Software version .............................. : Rating ............................................... : V1.0 V0.5 AC100~480V,50/60Hz Result................................................ : PASS Report No.: MTWG2207145-H Page 2 of 5 T E S T R E P O R T Equipment under Test : Smart Junction Box / Smart Junction Box (480V version) Model /Type : OPA-1 Listed Models Remark: : OPB-1 The internal circuit is the same, only the output voltage is different. Applicant : TrolMaster Agro Instruments Co., Ltd Address : Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong Manufacturer : TrolMaster Agro Instruments Co., Ltd Address : Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong Factory 1 : TOPE (XIAMEN) ELECTRONICS CO.,LTD No.98-2, North Xinglin 2nd Road, Jimer District, XIAMEN, Fujian 361022 Factory 2 : Alder Optomechanical Corp. No. 171 Tianjin Street, Pingzhen Dist. Taoyuan 32458, Taiwan Factory 3 : Amber Horticultural Technology Ltd. No.39, Daji Rende Dist, Tainan City, 717007, Taiwan Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: MTWG2207145-H Page 3 of 5 Contents 1. Revision History Revision Issue Date Revisions Revised By 00 2022.08.11 Initial Issue Alisa Luo Report No.: MTWG2207145-H Page 4 of 5 2. SAR Evaluation 2.1 RF Exposure Compliance Requirement According to FCC Part1.1310: 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 part1.1307(b) F= Frequency in MHz Friis Formula Friis transmission formula: Pd = (Pout*G)/(4* Pi * R 2) Where Pd = power density in mW/cm2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Report No.: MTWG2207145-H Page 5 of 5 2.1.3 EUT RF Exposure EIRP =PT*GT= (E x D)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 (dBμV/m)/20) /10 6 , D = measurement distance in meters (m)---3m, So PT = (E x D)²/30 / GT The worst case (refer to report MTWG2207120s below: Antenna polarization: Horizontal Frequency (MHz) Level (dBuV/m) Polarization 915.0 77.85 Peak 915.0 65.84 Average Antenna polarization: Vertical Frequency (MHz) Level (dBuV/m) Polarization 915.0 78.46 Peak 915.0 66.13 Average For 915.0MHz wireless: Field strength=66.13 dBuV/m Ant gain:3dBi;so Ant numeric gain=2 EIRP = PT*GT = (E x D)²/30=(10 (dBμV/m)/20) /10 6 *3) 2 /30=0.0000012 So PT= EIRP/GT=0.0000006W=0.0006mW So Pd = (Pout*G)/(4* Pi * R2)=(0.0006*2)/(4*3.1416*20 2 )=0.0000002 exclusion=0.0000002<0.61 So the SAR report is not required.

Shenzhen Most Technology Service Co., Ltd. No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. TEST REPORT FCC Rules Part 15.249 Report Reference No. ..................... : FCC ID.. .......................................... : MTWG2207145 2A33F-OPA-1 Compiled by ( position+printed name+signature) .. : File administrators Alisa Luo Supervised by ( position+printed name+signature) .. : Test Engineer Sunny Deng Approved by ( position+printed name+signature) .. : Manager Yvette Zhou Date of issue ..................................... : Aug.11, 2022 Representative Laboratory Name .: Shenzhen Most Technology Service Co., Ltd. Address ............................................ : No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. Applicant’s name ............................ : TrolMaster Agro Instruments Co., Ltd Address ............................................ : Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong. Test specification/ Standard ..........: FCC Part15 Subpart C, Section 15.249 TRF Originator .................................. : Shenzhen Most Technology Service Co., Ltd. Shenzhen Most Technology Service Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Most Technology Service Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Most Technology Service Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Smart Junction Box / Smart Junction Box (480V version) Trade Mark ....................................... : TrolMaster Model/Type reference....................... : OPA-1 Listed Models .................................. : OPB-1 Modulation Type ............................... : LORA Operation Frequency ........................ : 915MHz Hardware version ............................. : Software version .............................. : Rating ............................................... : V1.0 V0.5 AC100~480V,50/60Hz Result................................................ : PASS Report No.: MTWG2207145 Page 2 of 25 T E S T R E P O R T Equipment under Test : Smart Junction Box / Smart Junction Box (480V version) Model /Type : OPA-1 Listed Models Remark: : OPB-1 The internal circuit is the same, only the output voltage is different. Applicant : TrolMaster Agro Instruments Co., Ltd Address : Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong Manufacturer : TrolMaster Agro Instruments Co., Ltd Address : Room 02-03, 25/F, Well Tech Centre, 9 Pat Tat Street, San Po Kong, Kowloon, Hong Kong Factory 1 : TOPE (XIAMEN) ELECTRONICS CO.,LTD No.98-2, North Xinglin 2nd Road, Jimer District, XIAMEN, Fujian 361022 Factory 2 : Alder Optomechanical Corp. No. 171 Tianjin Street, Pingzhen Dist. Taoyuan 32458, Taiwan Factory 3 : Amber Horticultural Technology Ltd. No.39, Daji Rende Dist, Tainan City, 717007, Taiwan Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: MTWG2207145 Page 3 of 25 Contents 1. REVISION HISTORY ................................................................ 4 2. TEST STANDARDS .................................................................. 5 3. SUMMARY ............................................................................. 6 3.1. General Remarks 6 3.2. Product Description 6 3.3. Equipment Under Test 6 3.4. Short description of the Equipment under Test (EUT) 6 3.5. EUT operation mode 6 3.6. Block Diagram of Test Setup 7 3.7. Test Item (Equipment Under Test) Description* 7 3.8. Auxiliary Equipment (AE) Description 7 3.9 Antenna Information* 7 3.10. EUT configuration 7 3.11. Modifications 7 4. TEST ENVIRONMENT ............................................................... 8 4.1. Address of the test laboratory 8 4.2. Environmental conditions 8 4.3. Test Description 9 4.4. Statement of the measurement uncertainty 9 4.5. Equipments Used during the Test 10 7. TEST CONDITIONS AND RESULTS ............................................ 11 7.1. AC Power Conducted Emission ................................................................................... 11 7.2. Radiated Emission ........................................................................................................ 14 7.3. 20dB Bandwidth ........................................................................................................... 22 7.4. Antenna Requirement ................................................................................................... 23 8. TEST SETUP PHOTOS OF THE EUT .......................................... 24 9. EXTERNAL AND INTERNAL PHOTOS OF THE EUT ....................... 25 Report No.: MTWG2207145 Page 4 of 25 1. Revision History Revision Issue Date Revisions Revised By 00 2022.08.11 Initial Issue Alisa Luo Report No.: MTWG2207145 Page 5 of 25 2. TEST STANDARDS The tests were performed according to following standards: The tests were performed according to following standards: FCC Rules Part 15.249: Operation within the bands 902 - 928 MHz, 2400 - 2483.5 MHz, 5725 - 5875 MHz, and 24.0 - 24.25 GHz. ANSI C63.10:2013 : American National Standard for Testing Unlicensed Wireless Devices ANSI C63.4: 2014: –American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40GHz Range of 9 kHz to 40GHz Report No.: MTWG2207145 Page 6 of 25 3. SUMMARY 3.1. General Remarks Date of receipt of test sample : 2022.07.20 Testing commenced on : 2022.07.21 Testing concluded on : 2022.08.11 3.2…

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Model No.: OPA‐1 CE TEST SETUP RE TEST SETUP Model No.: OPA‐1 RE TEST SETUP