Retevis RT1 10W Two Way Radio UHF 16CH VOX 3000mAh Handheld Transceiver and 2 Pin PTT Covert Acoustic Earpiece (5 Pack) 10W output power can offer you long range and crystal communication even in an obstacle environment 3000mAh battery supports 260 hours long standby time and suit for your long time work Worked great right out of the box dont need to program; 16 memory channel easy to use VOX function provide you real hands free and covert acoustic earpiece can keep your communication private Simple and convenient return process;1 year warranty and 30 day return with no questions asked