YingJiao Plug In Power Supply Units Mains PSU (fixed voltage) 626452 - YingJiao YS10-0502100 USB, The YingJiao YS10-0502100 USB Mains PSU (fixed voltage) is a stabilised power supply providing 5 V and 2.1 A output, delivering 10.5 W of power. This fixed voltage power adapter is typically used for powering small electronic devices like USB toys and gadgets. Its reliable performance makes it suitable for any application requiring a mains-fed power supply. YingJiao YS10-0502100 USB Mains PSU 5V 2.1A 10.5W Fixed Voltage