The AirLine Micro Wireless Earset 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.SPECIFICATIONS:AirLine Micro Wireless Earset SystemWireless UHF 600 MHz system with micro-size AH2 transmitter and AR2 receiverTone squelch and auto mute for clear operationIncludes a convenient system carry case Includes AC adapter and charging cablesAH2 TransmitterEarset transmitter and omnidirectional microphone with no beltpackLithium ion rechargeable battery (5-6 hours of operation)USB DC input for rechargingSingle button operation for power, mute and volumeWater resistantAR2 ReceiverLow-profile wireless receiver (2.36" x 1.67" x .51")Lithium-ion rechargeable battery (7-8 hours of operation)USB DC input for power and recharging3.5mm balanced mic/line level outputAR2 DockProvides secure base for AR2 receiver during operation and/or rechargingUSB DC input for power and recharging (cables included)3.5mm balanced audio output (cables included)