With GPS IP67 Waterproof Handheld Transceiver TYT MD-390 DMR Digital Walkie Talkie UHF400-480MHz Compatible with Mototrbo 1000CH CTCSS DCS with GPS Large Capacity Battey with 2200mAh IP67 waterproof function: can stay for about 30 minutes 1m underwater 1000 channels Both work in Digital and Analogue Mode.Remote kill/stun/activate,Voice prompt,Power-on protection,Color LCD display,Text messages in digital mode,ncryption function,Built-in CTCSS/DCS Compatible with Mototrbo Tier I&II DTMF decoding and encoding