Electric Drop Fail Secure Mode DC12V/24V with Adjustable Time Delay Open When No Power 100% new and high quality. Especially suitable for wooden and metal doors. It is made from and high aluminium alloy material, for use. With no external interference, making it more stable and . Has 0, 3, 6 seconds time delay adjustable. Product Specifications Working Voltage: DC12V Lock Mode: Magnetic induction Dimension: 150 x 34 x 28 mm Lock Mode: Magnetic induction Working Current: star-up: 1.2A, operating: 0.25A Specifications: Unlock when power off Color: silver Material: aluminum alloy Different batches and different codes not affect the use Package Contents: 1 x main lock 1 x secondary lock 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.