Passive Smart Lock, Bluetooth Padlock manufacturer / supplier in China, offering Fingerprint Unlocking Card Unlocking and APP Unlocking Smart Lock Padlock, Steel Flammable Goods Storage Cabinet, Fireproof and Explosion-Proof Cabinet, Fireproof Cabinet for Flammable Liquids/Chemicals, Mobile Phone Signal Physical Shielding Cabinet, Steel Phone Lock Box, Effectively Shield 5g Signals and so on.