Car Charger SENHAI Three Hole Panel Multifunction kit LED Digital Voltmeter / Dual USB 2 Port Charger / DC 12V Power Socket Suitable To install In Any 12V-24V Motorcycle, Boat, Trucks, Car etc. Can indicate a poor or bad charging system. Tells whether your battery is holding a charge or not. Comes with waterproof and dustproof cap for the interior and exterior use. Easy to installed vertically or horizontally or any flat surface. Function port can be detached and rearrange. Short circuit / overheat protection.