For Use With Home Stereo And Car Stereo Sound System Speakers, Qofowin Usb, M1). Features: Brand new and Super quality Bluetooth 2.1 Music Audio Receiver Adapter, you can enjoy the CD quality music while playing your phone touch wirelessly through your home stereo.The wireless distance can up to 33 feet away in open space without obstacle. Super clear and flow conversation effect. With Bluetooth 2.1 technology, you'll get reliable, high-quality sound.Easy Installation:Plug it to your car AUX port or Home AV surrounding system via the 3.5mm, Audio Cable or the 3.5mm Connector; Specifications: 1. Support Bluetooth : Bluetooth V2.1+EDR 2. Support A2DP ,AVRCP,AVDTP,HFP and HSP 3. Power supply:USB 5V power supply 4. Output:3.5mm Audio interface 5. Distance: 5-10 meters 6. Receiving distance: not less than 10m Package Contents: 1 x Bluetooth Audio Music Receiver 1 x 3.5mm Audio Cable Q: will the sound sync when I watch the video? A:1. It will have delay of 0.3 second.Purchase is not recommended.2. It's great if you just listen to audio and music Q:My car stereo only has USB, can I use it A:1. Some cars do not support USB access to bluetooth. 2. You can try to buy it.If it doesn't work please email me and I will return it for no reason note: 1.If you have any questions, Please contact me by email,thank you. Wireless Play: Removing troubles of wired connection,through the wireless connection and transmission,the user can enjoy a high fidelity music at any place indoor by wireless control Easy To Operate: Simply connect your speaker with our device,immediately transform your speakers into a fashionable wireless bluetooth speaker Use for Home Theatre, Mobile Phone, Karaoke Player, Stage Important note: the bluetooth device name is YET-M1,Transmission Rate:3(Mbps) . Transmission Distance: up to 10m Portable Design: With Mini size,the feature of portable can let you carry them to anywhere you want