Features: 1. make your car aux sound system and home theater system av Ivy surrounding become Bluetooth compatible, to get music from Bluetooth-enabled devices such as the iPhone, iPad, iPod, Samsung's htc smartphone or Bluetooth PC's, Laptops.2. simply connect this Bluetooth audio receiver to the line of speakers at or auxiliary input on the pair to Bluetooth-enabled devices, and enjoy wireless music revolution.3. whether you want Bluetooth convenience in your car, through your home theater system, in your kitchen, bathroom or bedroom, etc.4. simple, 3.5 mm Male to Male Audio connector or 3.5 mm male-to-male cable to connect the speakers and receiver.5. High-performance amp chip, can push headset, and high-power amplifier, it applies to all types of speakers.6. powerful Bluetooth ic, more powerful compatibility.7. Powered by a rechargeable built-in battery through mini usb port, long working time and low consumption. (Mini usb cable).8. You can play music through your car stereo and Answer phone call via built-in microphone.Specifications:Dimensions: 52 mm (l) × 21 mm (w) × 11 mm (d) Bluetooth v3 + edr, Category 2Support a2dp v1.2 (built-in microphone)Powered usb 5 volts DC Transfer: 3 rate (12mbps)Built-in microphone Transmission distances up to 10 meters Stereo support a2dp3.5-millimeter stereo inlet socket Sleep mode to save power Function support Bluetooth hands-free Up to 8 hours of music or continuous run Jacks music wireless receiver connects 3.5 millimeter headset Use with home stereo / headphones, car stereos, headphones etc. How to use:   1. power on/off Power on: press the on / off button for 5-7 seconds until you hear "ready to deliver or sound," and it will auto connect the phone that has been paired. Out Power: Press the on / off button for 4-5 seconds until you hear a "long or be the Red led".2. connect the receiver to the speakers With 3.5 millimeter Male to Male Audio connector, or 3.5 millimeters male-to-male cable to connect the speakers and receiver (if any sound, please be sure to have been completely enter).3. Pairing(1) Ensure that talk is the cheapest mode(2) Pairing: Click on the on / off button for seven seconds until you hear "ready to deliver or sound" (when you press the button until you hear a report "ready to deliver"). The index led flash between red and blue alternately. It is now ready for pairing.(3) Activate Bluetooth mobile phone Bluetooth function and search for available devices with reference to the mobile phone's user guide for details.(4) select "BT310REV or DL-LINK" from the menu.(5) When peeling is complete, the voice of "continuous or short-Baby" and index led blue flash alternately report. Compatible with: IPhone 3 g, 3gs, 4, for a period of 4 seconds, 5, 5c and 5 seconds, 6.6 Plus For iPad 1.2, 3.4, Air, mini1 and 2Computers with Bluetooth 2.1 and above For Samsung, for htc, etc., all the other Android 2.1 (and above) devices with Bluetooth Smartphone with Bluetooth 2.1 and above Package included: 1 × Bluetooth Music receiver built-in mic1 × Micro usb power cable1x3.5 mm stereo socket entrance