Parameter: these usb buck module input voltage range DC 12V and output voltage default DC 5V, the maximum output current is 3A, no-load current is 10mA and the maximum output power will reach 15W USB and high conversion: this DC to DC converter module has USB charging ports, DC to DC buck converter has integrated switch thin regulator module, the conversion rate is as high as 96% Intelligent protection: this 12V to 5V DC converter is using intelligent microprocessing chip, over voltage, over current, over temperature and short circuit, it can be auto protection Wide application: DC converter module 12V to 5V is widely applied for GPS navigation, driving recorder, electronic dog, car radio, MP3, MP4, walkie talkie, surveillance system, bus display, taxi advertising screen, LCD TV, LED, etc. Warm prompt: the power of devices must be lower than 15W when using this DC to DC converter 12V to 5V, and not compatible with partial Samsung phones