Competition challenge of scanners montaged by Poyeshgaran and OKM EXP 4500

Competition challenge of scanners montaged by Poyeshgaran and OKM EXP 4500 as one of the most expensive and top products of OKM company

Use handsfree to heat beep sound of devices sense.

Users could repeat the above test with any system of OKM company and in case observing contradiction, they could report it in form of a clip and receive a reward!