The 2 in 1 Bluetooth 4.1 Audio Adapter works as both Transmitter and Receiver. With a simple 3.5mm-connection to your non-Bluetooth speakers or stereo, you can stream music wirelessly from your host devices including smartphones, tablets, and laptops. And you can also stream music from your music player to your Bluetooth-enabled speaker or headphones – all in a convenient, wireless way. Featuring advanced Bluetooth 4.1 technology, it supports all Bluetooth-enabled devices like speakers, headphones, smartphones, tablets, laptops and more. Simple one-button switch to shift between transmitter and receiver mode. Bluetooth ReceiverStreams music wirelessly from your smartphones, tablets, laptops and more at a simple 3.5mm-connection with your speaker or stereo. Bluetooth TransmitterConnects to media players, MP3, CD / DVD players, e-readers, TVs and more, and streams music from it to your Bluetooth-enabled speaker or headphones. Bluetooth 4.1 + EDREnsures stable signal, super-fast data transmission and high-fidelity stereo sound. Multi-point TechnologyCan simultaneously connect two smarts phones. Noise CancellationWith advanced noise cancellation technology, it offers you magnificent stereo sound & superb sound quality. Lossless Audio FormatSupports Stereo Code & AUX Output for superior wireless performance. Easy SwitchSimple one-button switch to shift between transmitter and receiver mode. Specifications Name Bluetooth Receiver & Transmitter Bluetooth Version V4.1 Protocol A2DP, AVRCP Effective Range 10 meters Built-in Battery 600mA Playing Time 8 hours Charging Time 2 hours Input DC 5V Compatibility iOS/Android Package Weight 70g Package Size 13 x 8 x 5 cm Accessories 1 x Adapter, 1 x USB Cable, 1 x 3.5mm Audio Cable