Input: 110V/220V AC; Output: DC 12V, maximum 30A, output voltage adjustable by 15%. Three sets of output channels.(110V/220V must be by switch before using to avoid damaging) Smart protection: Automatic overload cut-off, over Voltage cut-off, automatic thermal cut-off, short circuit protection. Great for LED Strips, 3D Printer, ham radio transceiver, CCTV cameras, audio amplifier, wireless router, heater, HUB, air compressor power supply. Indoor use only. Built-in cooling fan and temperature detector. When the operating temperature is reached, the cooling fan automatically runs to maintain good performance of the device. All-aluminum metal shell, efficient entry into the air outlet. Note: Before wiring and adjusting the voltage, do not power on the machine, and do not allow the machine to operate at a current exceeding the rated current! The operating current should be less than 90% of the rated current. Color:As shown Material:Metal Package Contents: 1 * 24v dc power supply 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.