BABA-8100 is the premium smart door lock with following functions. ? Password Opening (20 passwords can be registered) ? Card Opening (50 Cards can be registered) ? Double Lock Function ? Master Card Function ? Master Password Function ? One-time Password ? App Control (Bluetooth chip is chargeable) ? Low Battery Alarm ? Robbery & & Intrusion Alarm ? Wrong Password Alarm (After entering wrong password 5 times in a row) ? Fire Alarm (Only from inside the room) ? Voice Guide ( English, Vietnamese, Chinese, Korean languages are available) ? Random Password entry ( up to 20 digits including actual password) ? Battery (AA Alkaline type 4 Pieces) ? Emergency Battery ( It is applied from outside when battery runs out) ? Remote Control (Optional for additional charge) ? Sound Mute ? Antimicrobial Coating (Optional for additional charge) ? Door Thickness - 35mm ~ 100mm ? Weight- 2.8 k.g ? Size - 85mm (W) -235mm (H) - 72mm (D) ? Working Temperature -15 to +60 C ? Product Material: Iron, Zinc, Ai Die casting ? Country of Origin - South Korea