Description: the 3.5mm audio interface, and transmit to the headset via , so to disturb your family when watching movies at night. Connect AUX interface through the adapter/transfer cable, and connect the audio, which can not only make calls, but also music Built in rechargeable battery, once, be used continuously for 4 hours when the battery , convenient. 5.0 does not freeze when listening to songs, consumption, high speed, stable signal transmission, and listening to songs more smoothly. Lossless sound quality level enjoyment high resolution restoration of lossless sound quality, bringing experience, you could the music in Specification: Material: ABS Size Chart: 5.9cm x 2.1cm x 0.6cm / 2.32inch x 0.81inch x 0.24inches Package Includes: 1x 5.0 Car Receiver(3 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.