The AirLine Micro Earset Wireless System is a breakthrough that utilizes the latest in lithium ion battery technology and small, high-quality audio and RF components to bring performance freedom and convenience to a new level. The result is not only our smallest wireless system, but also our most comfortable, reliable and versatile system ever. To eliminate continually changing batteries, Samson has designed this micro-size UHF wireless 600 Mhz system to be fully rechargeable, supplying lithium-ion rechargeable batteries and USB DC power inputs for both the AH2 earset transmitter and AR2 receiver. A handy docking station for the receiver also provides a USB DC input and a 3.5mm balanced audio output. Because of these convenient recharging capabilities, the days of constantly changing the batteries in your wireless system are over.