Feature rich, high performance TK-3601D 48 Channels pre-programmed with 16 Analogue PMR446 Frequencies plus 32 dPMR446 Digital Frequencies AMBE+2 Vocoder for Natural Sounding Digital Voice Built-In Voice Scrambler Two push to talk buttons to easily initiate calls in either analogue or digital modes Selectable seven LED colour options can be set to identify different caller units at a glance White backlit LCD for clear display in all lighting conditions Long battery life between charges (up to 19 hours) "Industrial Strength" Construction, to US MIL-STD Specification 810G and IP54/55/67 Supplied complete and ready to use with battery, charger and belt clip