1. Security Chip: The smart key safe uses encrypted security chip to formulate a perfect data protection scheme to protect all your unlock data, more secure use. 2. Anti-interference: Independent electronic protection system could protect the layout from the interference of strong magnetic field, to avoid illegal unlocking of the little black box. 3. APP Remote Control: Communicate with the smart lock through APP, as long as you carry your mobile phone, you can control it as easily as you are in front of the lock, no matter where you are. 4. Emergency function: When the battery power is abnormal or the password is forgotten and the lock is abnormally activated, set the emergency charging socket function to use the power bank ( not included) to quickly open the lock. 5. Unlock method: There are several unlock methods, such as password unlock, dynamic password unlock and APP unlock, which are used for key storage with high security. Specifications: Item Type: Smart Key Box Material: Zinc Alloy + ABS Usage: Key Storage Unlock Method: Password Unlock, Dynamic Password Unlock, APP Unlock Power Interface: Micro USB Level Waterproof: IPx5 Battery performance: about 12 months Operating temperature: -20 to 60 Battery type: 4 AAA batteries (not included). Product size: approx. 14.5x10x5.5cm/5.7x3.9x2.2in Package List: 1 x Lock Box 1 x Installation Punch Card 1 x Manual 1 x Power Cord 4 x Screws 4 x Expansion Tube