This is a mini DC step down voltage converter module with 12-60V input and fixed 5V 12V dual voltage output. The step-down power supply module support over-current protection,when the voltage is over 1A, it will shut down the power automatically ideal for DIY 12V 5V power supply module for CCTV,telecom communication devices,etc. Specifications: Input Voltage: 12-40V Output Voltage: 5V, 12V Maximum Output Current: 1A(over current protection) Module Size: 35 X 23 X 30mm/1.38 X 0.91 X 1.18inch(L*W*H) Package Included: 1X DC-DC Voltage Regulator Module 12-40V to 5V 12V 1A Dual Output