Astrum BT220 2-In-1 Transmitter & Receiver is a universal Bluetooth audio adapter that makes your TVs and other devices Bluetooth enabled to stream audio to your Bluetooth headphones, or home stereo device (Only support to be paired with one Bluetooth receiver). Works with a device that has a 3.5mm port. No driver required plug ready to use, switch between transmitter and receiver modes with a single switch. A built-in rechargeable 200mAh lithium battery ensures music playback for 5 hours without a power connection. Ultra-portable, but with powerful wireless audio streaming, enables your non-Bluetooth audio source (Phone, iPod, PC, eBook, MP3/MP4, CD/DVD players, TV, etc to connect with your BT speakers, BT headsets, etc. Also stream audio from BT devices to your car stereo, home speaker, etc.