★ This product adopts ultra-thin design, small and exquisite, easy to install and stable. ★ Its working method is to power on and unlock the door lock, which is very convenient to use, low power consumption, voltage 12v, current only about 400 ma, and the power supply is immediately triggered! ★ It has a long service life, 100,000 aging tests, long service life, anti - vibration, anti - prizing, anti-drilling and anti-technology open design!, Manufacturer: Sonew