This circuit voltage can be from 0 v, output current can be ma from 2 to 3 a continuously adjustable, set the output current, if the experiment circuit exceeds the current (including short circuit), the circuit protection immediately, not cause danger such as burning device, it is electronic manufacture's right-hand man. It is never afraid of the Like making all kinds of audio circuit friend, often due to the different working voltage and circuit have a headache, this circuit can also two series into a supply, can the needs of all sorts of use. Condition: New Type: Voltage Regulator Model Number: DC Regulated Power Supply DIY Kit Application: Computer Operating Temperature: -40-85 Supply Voltage: 0-30V Dissipation Power: 1 color:As shown Material:PC+Metal Package Contents: 1 x Adjustable DC stabilized power supply Kit(Due to different product batches, the appearance may be different, the function is the same) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.