Features: 2 in 1 Bluetooth Transmitter & Receiver： As a Bluetooth Audio Transmitter: C28 is specially designed for the Audio Devices (such as MP3, MP4, TV and PC, 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; As a Bluetooth Audio Receiver: C28 is specially designed for Car Stereo systems and Home Audio System. It can change the traditional Car Stereo systems and Home Audio System into Bluetooth-enabled ones, and easy to pair with Bluetooth-enabled Smart Phones, laptop, tablet, etc. With this product, you can greatly enjoy music from your phone, laptop, tablet without the hassle of cables. Specification: Model number: C28 Bluetooth: V5.0 Transmission Distance: 10m / 33ft Battery: Built-in Rechargeable Li-polymer battery Working Time: 4-6 Hours (depend on audio volume) Charging: Micro USB 5V/0.5A Audio Port: 3.5mm Package includes: 1 X Bluetooth Transmitter&Receiver Name: Bluetooth Adapter Feature 1: bluetooth adapter Feature 2: bluetooth adapter 5.0 Feature 3: bluetooth adapter 5.0 Feature 4: Wireless Receiver Transmitter Feature 5: bluetooth audio transmitter Feature 6: Bluetooth Adapter for Computer Feature 7: Bluetooth Adapter for PC Feature 8: Bluetooth Dongle Receiver Feature 9: bluetooth car adapter Feature 10: bluetooth transmitter audio Feature 11: bluetooth receiver and transmitter Feature 12: bluetooth aux adapter