External connection interface for convenient connectivity. Features a powerful 50W transformer. Provides a 5A output. Includes a remote control module locking slot for door access control systems. Battery polarity protection (only the fuse will blow if the battery is connected in reverse, preventing damage to the unit). Battery over-discharge protection. When the battery voltage is lower than 9.5V during battery use, the battery will automatically disconnect. Adjustable design, with a time delay adjustable from 0 to 15 seconds. Input Voltage: 110V-240V AC Output Voltage: 12V DC Output: 5A Power Lock Voltage: DC12V, NO, NC Optional delay: 0-15s Power: 50W Size: 212mm*172mm*70mm Material: Metal Color: As Shown Package Contents: 1 * Door Access Control Power Supply 1 * User Manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.