Features 2 In 1 Design The bluetooth adapter combines bluetooth audio transmitter and receiver in one with an 3 5mm aux jack Latest Bluetooth V4 1 chip imported from UK Bluetooth connection is more stable and wireless range is more than 33 feet Easy to pair and compatible with 99 9 Bluetooth devices Updated Bluetooth 4 1 ensures strong singal transmission high sound quality less crackling hissing or sound deteriorationDual connectionWhen used as a Bluetooth transmitter it can be paired to two Bluetooth receivers such as headphones and speakers simultaneously When working as a Bluetooth receiver it can still be paired to two smartphones or tablets but the receiver can only receive the audio from one of the two paired devices Please note that it only supports the codec of SBC when paired with two devices simultaneouslySmall Size BUT Long Battery LifeBuilt in 600 mAh polymer battery it can work up to 8 hours when used as a receiver and up to 6 hours as a trasmitter Enjoy superior stereo sound more with longer time compared to other brands at same priceBluetooth Everywhere As a Bluetooth Audio Transmitter TX Mode turn a non Bluetooth TV PC CD player Laptop Tablet MP3 MP4 including but not limited to into a Bluetooth transmitter with 3 5mm jack input port As Bluetooth Audio Receiver RX Mode it is ideal for home or vehicle music streaming sound system Enjoy HIFI CD like audio freelyBluetooth chip CSR57E6Supported protocol A2DP AVRCP HFP SPP