UHPPOTE Door Access Control Power Supply 12V for Electric Lock Intercom Camera is a reliable and efficient device that is suitable for worldwide voltage input of 110-240VAC. It is specially designed for access control system and Intercom Camera with a working current of 3A and 12VDC steady output voltage. It features a rotary timer potentiometer that ensures accurate delay time. It is important to note that the opening time must be set to 0 second when connecting with electric controlled lock to avoid burning down the electric bolt lock.