Compact, lightweight units for construction, manufacturing, property management, security, retail. Operate on FCC frequencies reserved for business use. 83 digital and 38 analog private line codes prevent hearing nearby users on the same channel. Built-in user changeable frequencies to match your current radios. Cloning capability for easy programming of multiple radios (requires optional Six-Unit Charger MTR53879, sold separately). Built-in audio jack permits use of optional headset/microphone (MTR53815), sold separately, in noisy areas or where privacy is required; voice-activated, handsfree (VOX) operation with optional audio accessories. Radios meet Mil Spec standards for high resistance to shock, vibration, dust and moisture. Includes NiMH battery, desktop charger and belt clip. Also accepts four AA batteries (not included). Manufacturer’s limited one-year warranty. Black. 2-1/2w x 1-3/8d x 5-1/4h (excluding antenna).