Material: aluminum alloy Unlocking: TUYA App/TTlock App, fingerprint, password, card, mechanical key Door thickness: 38-55mm Weight: 2.5kg/piece Standard mortise: 5050*22*160mm (other sizes can be negotiated) Power supply: 4 AA alkaline batteries Product size: 250*60mm(L*W) Optional: TUYA-ZIGBEE/basic model