Wireless audio Adapter is a device combined receiver and transmitter. When in transmission mode， Bluetooth Transmitter is specially designed for the Audio Devices (such as MP3， MP4， TV and PC， projector， etc.) without Bluetooth function. You can connect the Bluetooth Transmitter to the audio devices without Bluetooth function via the included 3.5mm Audio Plug， changing these audio devices into Bluetooth-enabled audio devices， and making it work with Bluetooth-enabled Headset and Speaker at the same time. When in receiving mode ， Bluetooth Receiver is specially designed for car stereo systems and home audio system which can change the traditional car systems and home audio system into Bluetooth-enabled ones. It's compatible with Bluetooth-enabled Smart Phones， laptop， tablet， etc. With this product， you can greatly enjoy music wireless. <br> <br> <strong>Features:</strong><br> <strong>[Transmission Function]</strong><br> You can connect the Bluetooth Transmitter to the audio devices without Bluetooth function via the included 3.5mm Audio Plug， changing these audio devices into Bluetooth-enabled audio devices. So that you can enjoy music in your earphone or in your speaker. It can also connect with two Bluetooth-enabled earphones or speakers at the same time.<br> <strong>[Receiving Mode]</strong><br> It can change the traditional car systems and home audio system into Bluetooth-enabled ones. After the Bluetooth Receiver is connected with speaker with 3.5mm audio cable， you can enjoy music from your phone wireless.  <br> <strong>[Application about Transmitter]</strong><br> Bluetooth Transmitter is specially designed for the Audio Devices such as MP3， MP4， TV and PC， projector， DVD， VCD， STB， radio， etc. <br> <strong>[Strong Compatibility about Receiver] </strong><br> It's compatible with Bluetooth-enabled Smart Phones， laptop， tablet and almost all Bluetooth-enable Audio Devices. Standard 3.5mm audio socket and cable enable to connect to most modern audio device.<br> <strong>[Touch Key &amp; Metal Material &amp; Endurance Time]</strong><br> Adopting touch key， it allows you to control easily with touch key. Convenient and easy for better using experience. Made of metal material， it's smooth and durable with high quality. With built-in 250mAh Capacity， it provides 7 hours of TX Mode Working Time and 7 hours of RX Mode Working<br> <br> <strong>Specification:</strong><br> Model: ZF-380<br> Bluetooth Version: 3.0<br> Transmission Distance: &gt;=10m ( free space)<br> TX Mode Working Time: 7 hours<br> RX Mode Working Time: 7 hours<br> Standby Time: up to 400 hours<br> Battery Capacity: 250mAh<br> Color: Black<br> Item Size: Approx. 6.3 * 6.3 * 1.5cm / 2.48 * 2.48 * 0.59in<br> Item Weight: Approx. 86g / 3.02oz<br> Package Size: Approx. 10 * 10 * 2.4cm / 3.94 * 3.91 * 0.94in<br> Package Weight: Approx. 155g / 5.44oz<br> <br> <strong>Package List:</strong><br> 1 * Bluetooth Adaptor <br> 1 * 3.5mm Aux Line<br> 1 * USB Charging Cable