Retevis RT1 10W Two Way Radios Long Range UHF 70CM 16CH VOX Scrambler Ham radio and Speaker Mic (5 Pack) Real 10W two way radio range up to 4 miles(6.4km) depending on environment and terrain Rechargeable 3000mAh battery supports 260 hours standby time and almost all day continuous use Durable and solid build 2 way radio with very crisp and clear audio; you can hear clearly even in a noisy environment or atgreatdistances Support encrypt and secure call; come with a common antenna and a high gain antenna great increasing the range We provide 1 year warranty and 30 days no reason to return; no matter any reason and within 30 days you can apply for a return