Retevis Walkie Talkie Antenna SMA-F Antenna Compatible Baofeng UV-5R BF-888S Retevis H-777 RT21 2 Way Radio (10 Pack) 10W Max power to boost the signal of your radio significantly Dual band antenna VHF/UHF with Frequency144/430MHz SMA Female antenna extremely wide scope of application Length of 6.6cm for Convenient to carry; you can put it in your pocket Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return