It is a 50W Car Converter/Power Supply Module/Power Adapter, Input voltage: DC 12V/24V (DC 8~40V), Output voltage: DC 5V, Output current: 10A, it has waterproof, damp-proof and shock-proof, overcurrent, over-temperature, low heat and dissipate heat protection, troubleshooting automatically resume work, very suitable for buses, CMB, large trucks, motor car so on.