Features:brand new and high qualityThere is a constant current indicator when chargings the battery. The chargings status is clear at a glance.The output power is large, the ventilation is good, and the natural heat-dissipation can achieve 280W/12A (note that there are output power and output current limits).10-60v wide input, suitable for most power supplies on the market as input sourceThe module adopts a step rectification scheme, which is extremely efficient, and the output is above 10V and the efficiency is as high as 92%-96%.The input has a 15A, and the reverse connection of the positive and negative poles of the input will not damage power supply (it will burn the fuses and need to be replaced). Specifications:Material:ABSInput: 10.5-60VOutput range: 0-45VMinimum output: 0V (+1V)Output constant current: 0.2-15A Maximum output power: 400WContinuous maximum working power: 280W Continuous maximum working current: 12A Working temperature: -10-85degreesWorking frequency: 100KHzConversion efficiency: up to 97% Size: Approx.60x60x45mm/2.36x2.36x1.81inches Note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1x Step Down Module