With this device， you can play music & answer phone call in your car or through your own stereo from your smartphone， MP3， tablet， etc. The best wireless experience ever!Features:High performance bluetooth technology: Music & phone call， free and relaxed. Super clear sound and flow conversation effect. Turn your regular stereo audio devices into a Bluetooth-enabled， wireless receiver streaming machine through 3.5mm audio-out jack.Plug and play， so easy to install: With 3.5mm audio plug， you can easily connect to cars， stereo， etc.Simple operation: Simple and easy wireless set-up， automatically connect， normal speaker become hands-free bluetooth speaker magically， portable bluetooth car receiver.Mini portable design: Take it with you and enjoy bluetooth music anywhere anytime.Work with any devices with bluetooth function: can connect to most cellphones， tablet， etc.Top grade rubber surface， super comfortable touch feeling.Multifunction button: One tap for play/pause， double tap for next song. There's LED working light on the button. Convenient to operation.Can connect to 2 devices at the same time.Specificatins:Bluetooth: CSR4.0Operating distance: about 10m (empty space)Working time: about 6 hoursCharging time: around 2 hoursUSB cable length: approx. 95cmAudio cable length: approx. 94cmSupport: A2DP， AVRCP， HSP， HFPRF frequency range: 2.4GHZ-2.48GHzOperating environment: -10℃ to +50℃Package size: 14 * 6 * 3cm / 5.5 * 2.4 * 1.2inPackage weight: 73g / 2.5ozPackage list:1 * Audio Receiver with 3.5mm Plug1 * USB Charging Cable1 * 3.5mm AUX Audio Cable1 * Enlish User Manual