Features:Colorful touch atmosphere light, 7 kinds of color can changeSupport quick charge function, can charge two devices at the same time3 in 1 multi-function of car charger, Bluetooth headset, and oxygen barPurify the air in car, give you a healthy spaceBluetooth V4.0 headset, auto answer / hang up, smart power on / off and auto pairing your phones ( one with two phones )Ear caps are made of medical grade silicone and offer 3 sizes for a custom fitPowerful purification, 4 layer filtration, nano dust removal and oxygen making techniqueStereo HD surround, chip DSR, smart DSP noise reductionOxygen bar can release more than 3 - 10 million ions, making your driving safer and healthierJust pick the headset up to answer incoming call when the phone is ringing and put the headset back into the charging port to end a callAuto power on when car engine starts and power off after 15mins without pairing with phoneLED red and blue light flashing alternately, equipment is searchable and in pairing state. Blue light flashing, paired and ready to useSpecifications: - Bluetooth version: 4.0 - Working distance: 5 - 10m - Chip mode: CSR BC8  - Input: 12V / 2A - 24V / 1A - Output: 5V / 9V / 12V 2.5A ( max )  - Oxygen power: Less than 1W  - Negative ion concentration: 3 - 10 million / cubic cm - Standby time: 96h - Talking time: 4h - Built-in 40mAh lithium-ion batteryModel Number: TL20  Material ( Cable&Adapter): ABS  Standby time: 96 hours  Battery Capacity: 40mAhPackage weight: 0.155 kg  Product Size(L x W x H): 9.00 x 3.50 x 3.50 cm / 3.54 x 1.38 x 1.38 inches  Package Size(L x W x H): 12.00 x 6.50 x 5.50 cm / 4.72 x 2.56 x 2.17 inches Package Contents: 1 x Car Dual USB Oxygen Bar Charger Adapter, 1 x Wireless Bluetooth V4.0 Headset, 3 x Earplug