Description: COMPATIBILITY - wireless Bluetooth FM transmitter adapter for car radio,transfer calling/MP3 music/Cellphone voices to car speaker. HANDS-FREE -built in microphone, switch to hands-free mode automatically from music playing status when receiving calls. Answer/reject/hand up/recall all in One key. BATTERY - battery voltage function: Show 3 seconds voltage when plug into the cigarette port. Always keep battery state of health. Then it turn to automatic play mode. EASY USE - Music playing:support Bluetooth /USB disk/TF card/ MP3/wma player. With anti-interference performance and CVC technology.Listening to music while charging. Automatically connect memorized paired when power on. Brand Name: STEVVEX Gadgets Model Number: STIL32CARE3 Material Type: ABS and metal Item Type: Bluetooth Car Kit Item Weight: 40g Special Features: Bluetooth Item Size: 8*5*3.7cm