The smart key lock box combines the convenience of Bluetooth Smart app, fingerprint, password and access card unlocking options to simplify access for you and your family and friends. The smart lockbox pairs seamlessly with Tuya Gateway (sold separately) for remote unlocking through the smart app, eliminating distance troubles and providing anytime, anywhere control. You don't need to be near the real estate agent lock box to access it anytime and anywhere. The smart key box is made of high-quality zinc alloy and solid steel for excellent durability and strength, ensuring protection against hammering and sawing. The portable key lock box comes with a removable shackle and can be mounted on the wall or door handle/fence hanging, providing flexibility to install anywhere you like. Powered by 4 AAA alkaline batteries (not included), emergency unlocking via USB port. Large capacity key lock box: 2.56 x 4.33 x 1.57 inches (approx. 6.9 x 11.5 cm), meeting multiple needs, including daily use, Airbnb, home service, car service, pet sitter and real estate business. color: Black material: metal Package Contents: 3 x Smart lock box 6 x Access control card 15 x Silicone hole plug 3 x USB cable 3 x Removable shackle