The power module uses a large heat sink to heat dissipation. Input and output use high frequency low resistance capacitors, output ripple is very low. The input voltage of the power module is large and the output voltage is stable. Including short circuit protection function,more safe and reliable to use. The maximum output power is up to 300W with a efficiency of 93%. Colour:green + black Material:Plastic + Metal Package Contents: 1 * Automatic Step-Up/Down CVCC Power Supply 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.