Bluetooth Receiver, Doosl 2nd Gen Bluetooth 4.0 Receiver, Portable Wireless Music Receiver Adapter Audio Stereo Speaker & Car Kits 3.5 mm Stereo Output Smartphones & Tablets. (Black) Bluetooth Receiver, convenient to control, just connect the Bluetooth receiver with your device's headphone jack via the 3.5mm AUX and pair the Bluetooth with your phone, then start to enjoy your favorite music. Bluetooth 4.0 Receiver, Inner 250mAh Li-battery, Operation Time is up to 16 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. Bluetooth V4.0 Music Receiver, compatible with car stereos, home stereos/speakers, headphones etc. most mobile devices with 3.5mm AUX port.