POWER-Time focus on Manfacturering, R&D two way radio accessories for more than 14years. Now we have professional R&D Team, sales team as well as Tooling factory. This Video shows how we do the testings. 1.Cable: Swing,salt spary, tensile, hi-low temperature 2.SPK&Mic: Audio testing, hi-low temperature, salt spray 3.PTT: Life cycle testing 4.Battery: ABS+PC to keep hi-low temperature, Cells selected one by one. Charge-discharge, Short circuit protection testing 5.Charger: Aging testing 6.Complete product: Matching with orignal equipment, like radios, charger , Battery work temperature: -20°- 70° Ultrasonic technology same with Motorola