Features:Wireless Audio AdapterA. Stream music on PC to stereoB. Plug & PlayC. Built-in rechargeable batteryD. Pocket-sizedWireless Audio Adapter for Remote Speaker Converter-- Plug Play， no driver software installation-- Glass panel surface-- Small light-- Built-in rechargeable battery-- Automatically pairing--48 Khz CD quality sound--Low power consumption--Support 1-n broadcastingSpecification: Interface: Transfer USB RF Dongle: USB Type A MaleReceiver Audio Output: 3.5mm Stereo Audio Jack FemaleReceiver rege power: 5V 500mA by Mini USBDimensions: Dongle: 5.1*2.05*0.9 cm， Box: 6.1*5.1*1.05 cmRF B: 2.4 GHzRF data rate: Up to 2 Mbps ， GFSK modulationAudio Output: 2 channel Audio OutTransfer Power Mode: Bus-poweredReceiver Power Supply: 3 50MAH lithium batteryPower consumption: Receiver less than 50mA @ 2.5VOperational Range: Up to 10 metersSystem requirement-- Intel Pentium III or AMD K6 500 CPU above-- At least 128MB RAM-- At least 50 MB hard disk space-- PC or Mac with one USB port-- With one of the following-- Work for Windows 2000/XP/Vista/7 or Mac OS x V10.x or higherPackage Contents:---Wireless Audio Transfer x1---Wireless Audio Receiver x1---3.5mm audio cable x1---Power Adapter (US/EU) x2---USB Cable x 2----1 to 2 Cable line x 1