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1. PAGE 1 OF 3 Test Report ID: Q 7 945 A Revision 0 Opsmen Tech Co., Ltd. Room 601, Building A, No.94 Liwan Road, Liwan District, Guangzhou, China Date of report: 1 / 31 /2 3 Date of sample receipt: 1 1 / 2 2/22 Dates of testing: 1/ 30 / 2 3 Technician: Sandar Bregg Table 1. EN352 - 7:2020 Test Result s for test ID Q7 945 A L - Criterion M - Criterion H - Criterion 111.8 dBA 1 12.4 dBA 11 5.8 dBA Minimum – Impulse noise Minimum – Impulse noise Minimum – Impulse noise 85 dBA – PASS 85 dBA - PASS 85 dBA - PASS Minimum – Non - impulse noise Minimum – Non - impulse noise Minimum – Non - impulse noise 94 dBA - PASS 96 dBA - PASS 97 dBA - PASS Product Tested: M20/M20T electronic earplugs f Standard Tested: EN352 - 7:2020 2766 W. College Ave Suite 1 State Colleg e, PA 16801 814 - 234 - 7042 phone 814 - 235 - 1381 fax Email: Kevin@michaelassociates.com URL: www.michaelassociates.com Figure 1 . Honeywell VS332i with Pro Tips

3. PAGE 3 OF 3 Table 4. H Noise La ATF Lc Ambient level (dBA) Mean SD Mean + SD L - Lap Lc 70 68.6 0.4 69.0 22.2 69.0 (C - A= - 1.2) 75 69.6 0.4 70.0 27.2 70.0 H - Oriented 80 70.5 0.4 70.9 32.2 70.9 Criterion Level 85 71.5 0.4 71.9 37.2 71.9 90 72.7 0.4 73.2 42.2 73.2 95 74.2 0.4 74.6 47.2 74.6 100 75.9 0.4 76.3 52.2 76.3 105 78.0 0.4 78.4 57.2 78.4 110 80.7 0.5 81.2 62.2 81.2 115 84.5 0.6 85.0 67.2 84.9 115.1 120 88.3 0.6 88.9 72.2 88.8 Passive ATF: 47.8 dB Michael & Associates is accredited by the National Institute of Standards and Technology (NIST) National Laboratory Accreditation Program (NVLAP) for tests performed according to ANSI S3.19 - 1974, ANSI S12.6 - 2016, AS/NZ S1270:2002 and EN352 parts 1 - 10. These accreditation criteria encompass the requirements of international standard ISO 17025. This report may only be reproduced or transmitted electronically in its entirety. This report shall not be used to claim product approval, certification or endorsement by NIST, NVLAP or by any agency of the U.S. Government. All measurement equipment are calib rated with instrumentation traceable to the NIST. Accreditation documentation can be viewed at www.michaelassociates.com/data/documents/NVLAP - 2023.pdf . Kevin Michael, Ph.D. President

2. PAGE 2 OF 3 Table 2. L Noise La ATF Lc Ambient level (dBA) Mean SD Mean + SD L - Lap Lc 70 70.3 0.6 71.0 31.0 71.0 (C - A=6) 75 71.4 0.6 72.0 36.0 72.0 L - Oriented 80 72.4 0.6 73.0 41.0 73.0 Criterion Level 85 73.5 0.6 74.0 46.0 74.0 90 74.7 0.6 75.3 51.0 75.2 95 76.1 0.6 76.7 56.0 76.7 100 77.9 0.7 78.6 61.0 78.6 105 80.1 0.9 81.0 66.0 80.8 110 82.8 1.1 83.9 71.0 83.7 112.1 115 85.9 1.2 87.2 76.0 86.8 120 89.4 1.3 90.7 81.0 90.2 Passive ATF: 39.0 dB Table 3. M Noise La ATF Lc Ambient level (dBA) Mean SD Mean + SD L - Lap Lc 70 70.6 0.5 71.1 23.5 71.1 (C - A=2) 75 71.6 0.5 72.1 28.5 72.1 M - Criterion Level 80 72.5 0.5 73.1 33.5 73.1 85 73.6 0.6 74.2 38.5 74.2 90 74.9 0.5 75.4 43.5 75.4 95 76.3 0.6 76.9 48.5 76.8 100 78.0 0.6 78.6 53.5 78.6 105 80.1 0.6 80.7 58.5 80.7 110 82.8 0.6 83.5 63.5 83.4 112.4 115 86.1 0.7 86.8 68.5 86.8 120 90.1 0.8 90.9 73.5 90.8 Passive ATF: 46.5 dB

5. Appendix APPENDIX 2 OF 2 Table 7. H - Noise DFE measurements DFE (dBA) Trial Ear 70 75 80 85 90 95 100 105 110 115 120 1 Left 68.8 69.8 70.7 71.7 72.9 74.3 76.0 78.0 80.8 84.6 88.5 Right 68.1 69.1 70.0 71.1 72.4 73.8 75.5 77.7 80.4 84.2 88.0 2 Left 68.6 69.5 70.5 71.5 72.6 74.0 75.7 77.7 80.5 84.3 88.2 Right 67.9 68.9 69.8 70.9 72.1 73.6 75.3 77.4 80.2 83.9 87.8 3 Left 68.9 69.8 70.8 71.8 73.0 74.4 76.0 78.1 80.8 84.4 88.3 Right 68.3 69.3 70.2 71.3 72.5 73.9 75.6 77.6 80.3 83.9 87.7 4 Left 68.8 69.8 70.7 71.7 72.9 74.3 76.0 78.0 80.7 84.3 88.2 Right 68.5 69.4 70.3 71.3 72.5 73.9 75.6 77.6 80.2 83.8 87.6 5 Left 68.9 69.8 70.7 71.8 73.0 74.4 76.1 78.3 81.1 84.9 88.8 Right 68.1 69.2 70.1 71.1 72.3 73.8 75.5 77.7 80.5 84.2 88.1 6 Left 69.1 70.1 71.0 72.0 73.2 74.7 76.4 78.4 81.2 84.9 88.8 Right 68.1 69.1 70.1 71.1 72.3 73.7 75.4 77.5 80.2 83.8 87.7 7 Left 69.0 70.0 70.9 72.0 73.3 74.7 76.5 78.6 81.6 85.4 89.4 Right 68.4 69.5 70.4 71.4 72.7 74.1 75.9 78.0 80.7 84.5 88.4 8 Left 69.5 70.5 71.4 72.4 73.7 75.1 76.9 79.0 81.9 85.8 89.7 Right 68.3 69.3 70.2 71.3 72.5 73.9 75.7 77.8 80.6 84.3 88.2

4. Appendix APPENDIX 1 OF 2 Table 5. L - Noise DFE measurements DFE (dBA) Trial Ear 70 75 80 85 90 95 100 105 110 115 120 1 Left 70.6 71.7 72.7 73.7 75.0 76.6 78.7 81.4 84.7 88.1 91.5 Right 69.9 71.0 72.0 73.1 74.3 75.7 77.4 79.7 82.4 85.6 89.1 2 Left 70.4 71.5 72.5 73.6 74.9 76.5 78.7 81.5 84.8 88.2 91.7 Right 69.7 70.8 71.8 72.9 74.1 75.5 77.3 79.5 82.2 85.3 88.9 3 Left 70.8 71.9 72.8 73.9 75.1 76.5 78.2 80.4 83.1 86.2 89.7 Right 69.9 71.0 71.9 73.0 74.1 75.5 77.1 79.0 81.5 84.3 87.5 4 Left 70.8 71.9 72.8 73.8 75.1 76.4 78.1 80.3 82.9 86.0 89.4 Right 70.1 71.2 72.1 73.2 74.4 75.7 77.3 79.2 81.6 84.5 87.7 5 Left 70.8 71.9 72.8 73.9 75.1 76.5 78.3 80.6 83.4 86.6 90.1 Right 69.4 70.6 71.6 72.7 73.9 75.3 76.9 79.0 81.6 84.6 88.0 6 Left 71.2 72.2 73.2 74.2 75.4 76.9 78.6 80.8 83.6 86.7 90.1 Right 69.6 70.8 71.7 72.8 74.1 75.4 77.1 79.2 81.8 84.8 88.2 7 Left 70.9 71.9 72.9 74.0 75.2 76.7 79.0 80.7 83.6 86.7 90.2 Right 69.9 71.1 72.0 73.1 74.4 75.7 77.4 79.5 82.1 85.1 88.5 8 Left 71.6 72.6 73.6 74.6 75.8 77.3 79.0 81.2 84.0 87.2 90.7 Right 69.8 71.0 71.9 73.0 74.2 75.6 77.3 79.4 82.1 85.1 88.5 Table 6. M - Noise DFE measurements DFE (dBA) Trial Ear 70 75 80 85 90 95 100 105 110 115 120 1 Left 70.8 71.8 72.7 73.8 75.1 76.5 78.3 80.6 83.5 87.0 91.1 Right 70.3 71.2 72.1 73.2 74.4 75.8 77.6 79.7 82.4 85.6 89.6 2 Left 70.6 71.6 72.6 73.6 74.9 76.3 78.1 80.4 83.3 86.8 90.9 Right 70.1 71.0 71.9 73.0 74.2 75.7 77.3 79.5 82.1 85.3 89.3 3 Left 71.0 72.0 72.9 74.0 75.2 76.6 78.4 80.4 83.1 86.4 90.3 Right 70.3 71.2 72.2 73.2 74.4 75.9 77.5 79.5 82.1 85.2 89.0 4 Left 71.0 71.9 72.9 74.0 75.2 76.6 78.3 80.4 83.0 86.2 90.1 Right 70.5 71.4 72.3 73.4 74.6 76.0 77.7 79.7 82.3 85.3 89.1 5 Left 70.9 71.9 72.9 74.0 75.2 76.7 78.4 80.5 83.2 86.5 90.5 Right 69.9 70.9 71.9 72.9 74.2 75.6 77.4 79.4 82.1 85.3 89.2 6 Left 71.3 72.3 73.3 74.3 75.6 77.0 78.7 80.9 83.5 86.9 90.8 Right 70.0 71.0 72.0 73.0 74.3 75.7 77.4 79.5 82.2 85.3 89.3 7 Left 71.1 72.0 73.0 74.2 75.4 76.9 78.7 80.8 83.5 86.9 90.9 Right 70.3 71.3 72.3 73.4 74.6 76.1 77.8 79.9 82.6 85.8 89.7 8 Left 71.6 72.6 73.6 74.8 76.0 77.5 79.2 81.3 84.0 87.4 91.5 Right 70.2 71.2 72.1 73.2 74.5 75.9 77.6 79.8 82.4 85.7 89.6

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