Adjustable Buck Boost Converter Power Supply Module ADVANTAGES: Made of high quality material, sturdy, durable and strong Large LCD display can display input/output voltage, output current/output power/output capacity/output time, easy to read. CNC adjustment is very accurate and fast, and can also increase voltage and reduce voltage. The output voltage can be adjusted according to 0,5-30V, with limited current can be adjusted 0-4A, according to your needs. Has connection protection against reversing the input tip, which does not burn out, is safe to use. Model: ZK-4KX Material: fiberglass glass plate, electronic component Size: 7,9 x 4,3 x 2,6 cm / 3,11 x 1,69 x 1,02 inch Color: as shown in the picture Quantity: 1 pieces Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia