Bluetooth Receiver, Doosl 20-Hours Bluetooth V4.1 Music Streaming Receiver Adapter and Car kit with 3.5mm Stereo, Music Receiver Bluetooth Receiver, convenient to control, just plug the AUX cable into your device's headphone jack and pair the Bluetooth with your phone, then start to enjoy your favorite music. Inner 400mAh Li-battery, Operation Time is up to 24 HOURS, Stand by Time is 800 HOURS, and it can be easily recharged via Micro USB cable. Designed of unique appearance and made of high-quality materials, super clear conversation effect. Three touched buttons for smoothly operating, and the built-in soft light will not cause distraction in car, safe for driving. Music receiver, compatible with car stereos, home stereos/speakers, headphones etc. most mobile devices with 3.5mm AUX port.