Runbo X1 Ip67 Rugged Water Dust Shock Proof Mobile Cell Phone Walkie Talkie (Unlocked) Standard SMA interface, freely extendable, Support multiple intercom, all free Support 38-levels CTCSS, Support different frequencies and CTCSS Set frequency by yourself UHF (400-470) or VHF (136-174) IP67 submersible up to 1meter under water 30minutes 100% Waterproof, Dustproof and Shockproof