1) This is a TTlock brand smart lock that supports unlocking via the TTlock app, IC card, and key fob. The TTlock app must be used with a smartphone to add keys before they can unlock the device. 2) Features an 8.5mm solid stainless steel bolt for enhanced security. 3) Swipe-to-unlock design with long-distance sensing up to 50mm. Compatible with most cabinet doors and drawers. Auto-rebound mechanism for smooth operation. 4) Supports emergency external power supply. When the battery is depleted, temporary power can be applied to unlock (requires access to emergency power terminals). 5) Low battery alert function. When battery is low, the lock will emit a warning. After unlocking in this state, the lock remains in an open position. Power supply: 4 x AAA batteries (not included) Note: Installation is not supported on doors with baffles or laminate materials. Card sensing distance: 50mm Unlock methods: IC card, key fob, TTlock app Color: Black Material: Plastic and steel Package Contents: 1 x Lock body 1 x Door strike plate 1 x IC card 1 x Sensor sticker 1 x Mounting screw kit (screw colors may vary; no color selection available) The package includes only the items listed above. Note: Due to lighting effects and monitor settings, the color shown in pictures may differ slightly from the actual product. Measurement error allowed within +/- 1-3cm.