Car Bluetooth Audio Receiver Converter Headphone Multifunction Bluetooth Converter Receive    Features: 1. Wireless loudspeaker: just plug the Bluetooth audio receiver into the loudspeaker input interface, then connect the smartphone to the Bluetooth audio adapter, the cable becomes wireless, no need to worry about winding, effective lossless transmission within 10 meters, switch music No need to run back and forth.  2. Hands-free calling function: hands-free calling, music stored in the phone and even playing Internet radio with one touch; the product has an embedded echo cancellation microphone, which can be easily used in music with just one button Switch between calls.  3. Compatibility: It can receive music on mobile phones or Bluetooth-enabled transmitters, car audio AUX system and AV home theater audio system. It is compatible with Bluetooth and Bluetooth music-enabled devices, such as for iPhone/iPad/iPod/smartphone or laptop.  4. Simple operation: It can be used for almost all audio receivers with input plugs, including car devices. Simply connect this Bluetooth audio receiver to the line input or auxiliary input of the speaker and connect it to the Bluetooth device.  5. Long-distance transmission: You can listen to music received from your smartphone and MP3 in your home speaker or car audio system, with a maximum transmission distance of 10m.  6. Low power consumption: Powered by a rechargeable lithium-ion battery integrated in the mini USB port, it has long working hours and low power consumption.    Specifications: Bluetooth:4.1+EDR;  Material:ABS;  Input jack:3.5mm;  Receiving distance:10m;  Talking time:4 hours;  Continuous music playback time:  Charging time:about 50 minutes;  Microphone sensitivity: +-42dB;  Output power:30mW;  Power supply voltage:4.2-3.3 (V);  Power:Charging with a mini USB cable;  Range of frequency response:20HZ~20KHZ;  FM frequency function:Yes;  Storage capacity:No memory;  Energy saving:Sleep mode;  Size:55*25*11mm;  Weight:52 (g);  Package Included: 1X Bluetooth Receiver;  1X USB Cable;  1X Instruction Manual(in English and Chinese)