Item Type: Smart Key Lock Box Material: Zinc Alloy + ABS Usage: Key Storage Unlocking Method: Password unlocking, dynamic password unlocking, APP bluetooth unlocking Power Interface: Micro USB Waterproof Grade: IPx5 Battery Performance: About 12 months Working Temperature: -20 to 60 Battery Type: 4PCS AAA Battery (NOT included) Product Size: Approx. 14.5x10x5.5cm/5.7x3.9x2.2in Package List 1 x Lock Box 1 x Install Punch Card 1 x Manual 1 x Power Cord 4 x Screw 4 x Expansion Tube 1Security Chip: The smart key safe box makes use of an encrypted security chip to formulate a perfect data protection scheme to protect your every unlocking data, more secure use. 2Anti Interference: Independent protection electronic scheme could shield the interference layout of strong magnetic field, to avoid illegal unlocking of the small black box. 3APP Remote Control: Communicate with the smart lock through the 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. 4Emergency Function: When the battery power supply 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 charge and quickly open the lock. 5Unlocking Method: There are multiple unlocking methods, such as password unlocking, dynamic password unlocking, and APP Bluetooth unlocking, which are used for key storage with high security.