Convoy&reg;Bluetooth Receiver,Mini Portable Bluetooth 3.0 Hand-free Adapter for Home Audio Music Streaming Sound System & Bluetooth Car Kits with 3.5 mm Stereo Output for Smartphones & Tablets Connect this stuff to your Wired Headset,speaker,car stereo,you can immediately turn them into wireless speakers. Simple and Easy Wireless Set-Up, Automatically connect, if you need your cell phone connect the receiver automatically, just turn on the Bluetooth of the cell phone first, and then turn on the Bluetooth receiver. Simple operation, normal speaker become hands-free Bluetooth speaker magically, portable for vehicle mounted systems. Two-link: can connect two Bluetooth devices at the same time. Bluetooth at least 10 meters working range. Extra-long built-in battery provides up to 10 hours playing time and only need 1.5 hours to charge it fully. Could be Charged with your cell phone charger