Retevis RT81 2 Way Radio IP67 Waterproof 10W Long Range Ham Radio UHF Rechargeable Walkie Talkies(4 Pack) IP67 waterproof and dust proof 2 way radio;strong and sturdy;use normally in complex environments Up to 10W power;encryption;VOX function;enhance communication distance and voice quality;privacy and reliability Battery capacity;7.4V/2200mAh rechargeable Li-ion battery just charge for 2 or 3 hours;using time up to 25 hours;but depend on the power used Digital/Analog mode switchable;compatible with Mototrbo Tier 1&2 including radios manufactured by Motorola;Hytera;Kenwood and Vertex Standard Simple return policy;1 year warranty and 30 days no reason to return (including the radio accessories)