Two Way Radio Rechargeable with Micro USB Charging + Air Acoustic Earpiece with Mic, (2 Pack)16 pre programmed frequency right out of box, can be used to communicate directly with each GA 2S on the same channel. By connecting a micro USB cable, you can charge it like a mobile phone without worrying about running out of battery. With the USB desktop rapid charger, you can easily charge in car and through a laptop . True 2 watt power can reach up to 3 miles range, 96 hours long standby time allows you to use it the whole day without charging.