Specification Product Name Hole Free Invisible Smart LockMaterial MetalColor Black SilverUnlock Methods Tuya App bluetooth IC card one key indoor button and manual key bypassPower Supply 4 x AA batteriesDimensions Lock Body 183 4mm x 71 4mm x 30mm Latch 110mm x 31mmApplicable Door Thickness Less than 60mmFeatures 1 Hole Free Installation Design Single sided indoor installation ensures no visible traces outside the door 2 Multiple Access Options Unlock with Tuya App IC card or manual override options such as an indoor button ensuring convenience and flexibility 3 Automatic LockUnlock Functionality Detects door closure to auto lock and unlocks automatically if battery power runs low 4 Real Time Management Remote unlocking and monitoring using Tuya App with viewable unlocking records 5 Quick Response 0 5 second IC card access for fast secure unlocking 6 Low Voltage Alarm Visual and voice alerts for low battery levels to ensure timely replacement Package Includes 1 x Smart Lock Body1 x Latch2 x White IC Card1 x Screws Pack1 x User Manual