: Color: Black Number Of Channels: 16 Number Of Batteries: 5 Lithium Ion Batteries Required. (Included) Tuner Technology: Rt1 Item Dimensions Lxwxh: 9.45 X 6.89 X 13.77 Inches Noise Level: 40 Db Item Weight: 6.48 Pounds Temperature Range: -20-55 Degrees Celsius Voltage: 7.4 Volts The Body Is Made Of Durable Materials; Enough To Withstand The Shock And Vibration In Harsh Environments; Can Be Used For A Long Time; Save The Cost Of Corporate Communications Built-In 3000 Mah Rechargeable Lithium Battery; Support 12-24 Hours Of Use Time; Meet The Needs Of Standard Shifts; High And Low Power Can Be Adjusted According To The Environment; Increase Battery Life Dual Antenna Design; Conventional Antennas Have Strong Toughness; You Don T Have To Worry About Breaking; High-Gain Antennas Can Further Expand The Communication Range In Extreme Environments G-Type Anti-Fall Earpiece; Can Clearly Transmit And Receive In Noisy