Retevis RT81 Digital Two Way Radio,Waterproof Walkie Talkies Long Range,Rugged,2200mAh,Group Call, Dual Time Slot,DMR Radio for Business (4 Pack) - FA9119AX4-C9018A

• RT81 high power walkie talkies are specifically designed for large commercial environments. channels are pre-set with CTCSS DCS to reduce unnecessary transmissions and therefore cannot talk directly to other brands of radios. if you need to talk to other brand walkie talkies. please contact us via Amazon mail. we will offer firmware for you Waterproof and dustproof. 100% IP67 waterproof. radios can be used normally after being soaked in 1 meter of water for 30 minutes Longer communication range. strong penetrating power makes sure that you can communicate between buildings and keep sound clear Ultra long service life. 2200mAh large capacity battery. more than 12 hours continuous working time in analog signal. exceed 20 hours in digital signal Clear sound quality. high power digital walkie talkies with DMR standard offers amazingly clear loud full quieting digital voice communication without static noise Sturdy and durable. strict shell structure and material allow you to use them in any complex environment Widely application. suitable for church. school. job sites. construction sites. beach club. hotel. etc