Tuya Smart Lock for Hotels Apartments & Offices - Bluetooth APP Fingerprint Password Smart Key Unlocking Note: Due to special reasons of logistics and transportation, the machine does not carry batteries. APP name is smart life .and Tuya smart app is support also. Gimdow smart lock A1 Ultra. This is an improved smart lock, which is suitable for existing door locks. The installation is very simple. People only need to paste it behind the door. Due to its unique design, it can be used with American and European door locks. It has a wireless keyboard on the outside and an encrypted Bluetooth-compatible application that allows people to enter its attributes with a simple code or click, but still use the original keys. People can share temporary virtual keys with people they trust (such as pet sitters, family members, friends, and Airbnb guests). GIMDOW A1 product parameters (lock) Apparent Parameters Product Dimensions:135mmX60mmX45mm Body Material:PC and Steel Color:Gray Net Weight:286g Hardware Parameters Communication Mode:above Bluetooth 4.0 Battery Date:AA battery*4 Endurance:300 Days APP Support Android:Above 5.0 iOS:Above 8.0 GIMDOW PT1  Ultra Product Parameters Apparent Parameters Product Dimensions:80mmX80mmX25mm Body Material :Aluminum alloy and PC Color :Black Net Weight :90g Hardware Parameters Communication Mode :Above Bluetooth 4.0 Battery Date : AA Battery*2 Endurance :300 Days APP Support Android : Above 5.0 iOS : Above 8.0