121 Privacy codes per channel to help reduce interference from others.Connect a VOX or PTT-type headset for private conversations (not included).Rechargeable niMH Battery packs.Dual charging cradle allows you to charge both radios simultaneously.Roger Beep lets you know when others are finished speaking The Uniden GMR 2638-2CK 2-Way Radio can be used up to a 26 mile range. It has 22 channels that offers 7 FRS and 15 GMRS channels. There are 121 privacy codes per channel to help reduce interference from others. With the dual charging cradle, you can charge bother radios simultaneously. Features rechargeable high capacity NiMH battery packs.