The HLP-40H-42 is a 40W AC/DC power supply from Mean Well's HLP series. This series of power supplies feature a 110/220V AC input and output voltages of 3V, 5V, 9V, 12V, 15V, 24V, 36V and 48V DC. The HLP-40H-42 model has a very wide input range of 90 ~ 264V AC, with a maximum output of 42.2V and 0.8A. It is also highly efficient, with a minimum of 80% efficiency. The unit also comes with a metal shell, built-in active PFC and Class 2 design. For added protection, the HLP-40H-42 comes with built-in over-voltage, over-current, short circuit, and over-temperature protection.