... heat, long service life , has two kinds: delay lock and no delay lock Low temperature design , low heat, long service life , ... has two kinds: delay lock and no delay lock. The working way: lock with power on , and unlock with power off. Matches the access ... second, 3 seconds, 6 seconds, 9seconds; Work power supply: DC12V(with back circuit protection), low heat. current for starting: 800mA work ...