Module name: 500w step-down constant voltage constant current adjustable power module Module properties: non-isolated step-down module Input voltage: 12-95V Output voltage range: 1.5-90V (can only , not step up, the output voltage can only be lower than the input voltage) Input and output pressure difference: 2V Output constant current: 0.3-18A (continuously adjustable) Output rated current: 15A Output rated power: 400w Input overvoltage protection: None (overvoltage prohibited) Working temperature: -10-+65 degrees Working frequency: 120KHz Precautions: 1. If the input voltage exceeds 36V, first turn the ON/OF switch to OF, and then turn the switch to ON after connecting the wires and powering on (to prevent during wiring) 2. This power supply is a step-down power supply, the output voltage can only be lower than the input voltage 3. In the case of natural heat dissipation, the power does not exceed 400W, and the current does not exceed 15A. There is a power limit. If the output voltage is high and the input and output pressure difference is large, please reduce the current to use 4. If the current exceeds 15A and the power exceeds 400W, please add a fan to dissipate heat Color:As Shown Material:Metal+Plastic Package Contents: 2 * Power 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.