Metal Case: supply shell, simple design, drop-, side cooling hole design, safe to use. Transformer: the transformer internal use of high-quality copper wire, high-power output. Intelligent electric board: adopts high quality circuit board, scientifically designed wiring port, convenient for external access control machine and electric lock. Fuse Setting: The power supply is designed with a fuse device, which automatically cut off the power when the voltage is too high to prevent further expansion of the fault. Efficient heat dissipation: double heat sinks to prevent overheating of capacitors. Adjustable delay time: new upgraded power supply, adjustable time. Input power supply: 110-240V, frequency 50-60HZ Functional characteristics: high level, low level, switching three control modes, over-current, over-voltage, short-circuit protection Output: voltage DC12V Delay adjustment range: 0-15S Colour:black Material:Metal style:3A Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 * Power Supply Transformer 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.