Specification: Type:  Analog Frequency band:  462~467M Hz (FCC) 430~440M Hz(CN) 446MHZ(CE) Channel: 22 channels (FCC) 121 subtone code 16 channels (CE)/121 subtone code Power: 0.5W/1W(FCC)0.5W(CE) Voltage:  3.7V Battery:  3x AA alkaline battery/Ni-MH battery Battery life: 17 hours (0.5W)/16 hours (1W) Headphone jack:  2.5mm Distance:  from the top of the mountain to the valley-16 miles Seaside-8 miles City-1 mile Micro USB: USB charging  USB charging Size (H*W*D): 174x54X30(mm) Weight： 94g QYT Electronics Co., Ltd.(QYT) was one of the earliest professional two-way radio and accessories manufacturers in China, and now one of the top mobile radio providers as well. QYT is headquartered in Quanzhou, Fujian, China. We are mainly responsible for the company's related product hardware development, production, sales and engineering services. Our company also provides customized services as well as personalized, differentiated products (OEM/ODM).