This car charger works with Advanced Design Bluetooth Headset. Simply plug it into your car cigarette lighter. Great for travelers to recharge their Bluetooth headsets on the go. Get one for each car. Specifications : Compatible with 12 VDC ~ 24 VDC systems. Fits in your car cigarette lighter socket. High performance charger. Easy and convenient to charge your Bluetooth headset in a vehicle. Overcharge and short circuit protection. LED charging indicator.