3.3V output: Input 4.5-30V, Output 3.3V (3%) 5V output : Input 6.5-30V, Output 5V (3%) 12V output : Input 13.5-30V, Output 12V (3%) AJD output : Input 4.5-30V, Adjustable Output 2-28V Maximum output current per channel : 3A; Overall maximum load power: 50 Working frequency 150KHz. Input reverse connection protection Built in thermal shutdown function,Built in current limit function,Built in second current limit function Operating Temperature :-40C to +85C Storage Temperature : -65C to +150C This is a DC- converter module,Must be when using: 1 Input voltage can not be the maximum input range 2 Output power can not be the maximum load for a long time 3 Input power must be the output power, because the power consumption of the module itself size:88x55x15mm Material:plastic colour:green Contents: 1 * DD31AJQA 3A 4-channels DC DC Step-Down Converter Module Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.