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 watts 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-DC voltage converter module,Must be noted when using: 1 Input voltage can not be greater than the maximum input range 2 Output power can not be greater than the maximum load for a long time 3 Input power must be greater than the output power, because the power consumption of the module itself size:88x55x15mm Material:plastic colour:green Package Contents: 3 x DD31AJQA 3A 4-channels DC DC Step-Down Buck Converter Module Only the above package content, other products are not included. Note: Light 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.