1、5mm AUX: This BT music receiver can be connected to home speaker, wired headset and phone, etc. 2、Stable Connection: This car BT 0 receiver is equipped with BT0 chip that ensures stable connection and fast transmission. 3、2 Devices Matching: This BT AUX adapter can be connected to 2 devices at the same time, don't worry about missing the phone call. 4、11yd Distance: This BT AUX receiver features about 11 yards effective distance, very reliable to use. 5、Durable Material: This BT 0 car adapter is made of premium plastic and metal material, strong and durable. 1 x Car BT 5.0 Receiver Item Type: Car BT  5.0 ReceiverMaterial: Plastic, MetalTransmission Rate: 100 (Mbps)Effective Working Radius: 10 Meters / 11ydBattery Capacity: 140mAhBT Standard: 5.0Operating Frequency: 2.4 (MHz)Product Size: Approx. 59.5 x 22 x 12mm / 2.34 x 0.87 x 0.47in ( Manual Measurement, Slight Error May Exist )