The Guidosimplex 1094FV hand control uses infrared technology to manage your vehicle's secondary controls by interfacing directly with the vehicle's electrical system. The illuminated key pad rotates, allowing personalization of key functions and position. Running on lithium batteries, this easily removable unit can either be charged through the vehicle's battery system or can be charged in any standard outlet with a battery charger. Adaptable to both sides of any steering wheel and all vehicles types. To remove the device simply push the button at the center of the wheel knob. The dusk sensor automatically activates the headlights. Accessory: Car battery charger; enjoy the comfort of recharging your battery without leaving the car. Standard battery charger, recharge your battery at home from any electrical outlet.