Product Name: Airbnb Apartment Electronic Bluetooth Keypad Digital Smart Door Lock Model NO.: V-BT831 Usage: Household Door Locks, Bedroom, Channel Lock Lock Cylinder Length: 90mm Door Thickness Fits: 35-50mm Backset: 55 Part: Lock Anti-theft Standard: B Shape: Mortise Door Lock Style: European Type: Electronic Material: Zinc Alloy Trademark: IWINTEC Transport Package: Carton Specification: 6pcs per carton Origin: Guangdong, China HS Code: 83014000 Product Description Features:- ANSI mortise, Euro mortise available.- Unlocking methods: Bluetooth, password and override key- Passage function: According to the requirement, can set passage (passage lock) function.- Low voltage alarm function, when battery at low voltage, it emit a cousticoptic alarm- Automatical lock after closing door, convenient to use.- Panic exit function, can be unlocked from inside without key.- Suitable for indoor, wooden door, etc.- Door thickness requires: 35~55mm, beyond this range, can customized.Technical Parameter:Communication modeBluetooth 4.0bleUnlocking wayBluetooth, Code, Mechanical keySupport SystemAndroid 4.3 / IOS 7.0 aboveUnlock time ≈1.5 secPower supply4pcs AA batteriesStatic current≤30uAWorking current≤200mA