Main features of power module 10-60v wide input voltage, suitable for most power supplies on the market as input source. The output is constant voltage and current, and the voltage and current are continuously adjustable. Suitable for most uses electrical equipment. High output power, good ventilation and natural heat dissipation can reach 280W/12A (Note that there are output power and output current limits). The module adopts a step rectification scheme with high efficiency and an output voltage of more than 10V. As high as 92%-96% or more, There is a constant current indicator when charging the battery. The charging status is clear at a glance. The input has a 15A fuse. Reverse input polarity not damage the power supply (it Burned fuse, need to replace the fuse) Module parameters Module name: 400w step-down constant voltage and constant current Module nature: non-isolated step-down module Input voltage: 10.5-60V Output voltage range: 0-45V (must meet voltage reduction conditions, IN input multiplied by 0.8) Minimum output voltage: 0V (+1V) Maximum output voltage: approximately input x 0.8 (for example, 40V, 40V x 0.8=32V Highest) The appearance and color of different batches of products may be different, which not affect the use. color: blue Material: PCB Package Contents: 5 x Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.