features:

       explosion-proof number:ce 18.2119

　　explosion-proof mark:exib iib t4 gb

　　ipx7 waterproof construction(1 meter depth of water for 30 minutes)

　　float function

　　vibration draining function

　　dual/tri-watch functions

　　70 programmable channels

　　call channel function

　　4-step battery life indicator

　　2-step power saver

　　auto scan fuction

　　quick channel selection with favour ite channel function