Retevis RT1 10W UHF Rechargeable Two-Way Radio 70CM 16CH VOX Scrambler Handheld Transceiver with Earpiece and Speaker Mic (2 Pack) True High-power 10W range up to 4 miles depending on environment and terrain;keep your smoothly communication all the time Powerful speaker support clear communication without distracting in noise environment Rechargeable Li-ion 3000mAh battery support for 8-10 hours fully charge; Low-battery alert VOX function for true hands-free communication;the scrambler to ensure the communication confidentiality Simple and convenient return process;1 year warranty and 30 day return with no questions asked