Retevis RT-B6 2 Way Radio Ham Radio Transceiver 5W Dual Band VHF/UHF 136-174/ 400-480MHz 99CH DCS/CTCSS DTMF FM VOX (4 Pack) and Speaker Mic (4 Pack) FM Commercial Radio Receiver Memory Channels:(65-108MHz) Better antenna:Inductively loaded antenna;2000mAh Li-ion battery can provide excellent battery life PTT-ID function could let you know who are speaking to you Time-out-timer(TOT):Preventtheusertooccupythechannelforalongtime Easy to program : If you need to re-program the radio, please contact us freely, we will provide you the Programming Software for free