This lock is widely used in apartments, office, hotel, rental house. The lock can work both TTlock app and TThotel app. TTlock app is mostly for apartments and office use; TThotel is mostly for hotel use, it is the online hotel management system, which can be remotley controlled on computer and phone app. Lock Details Lock material: aluminum alloy Color: silver, black, golden Card type: 13.56mhz card Bluetooth standard: bluetooth 4.0BLE Support phone system: Android 4.3/IOS7.0 Power supply: 4pcs AA batteries Low voltage alarm: support Working temperature: -40~70 degree Working current: less 200mA Standby current: 35uA Unlock way: APP, password, card, keys App send password: no limited Custom password 150pcs Fit for door thickness: 38-70mm Fit door type: wooden door, steel door, anti-thieft door Size For aparmtent use For apartment or rental house use, you can download the TTlock app on smart phone. Send e-Key and Password to unlock The e-key and password with the valid time, which is portable for you to manage in rental house, Connect to Alexa With the wifi gateway, the lock can connect to Alexa and google home. For Hotel use TTHotel is a online management system for hotel/apartment/school management. People use it to issue cards, passcodes, and ekeys. TTHotel manages buildings, floors, rooms, guests and staff. TTHotel manages various devices, such as smart lock, lift controller, card encode, gateway. TTHotel system includes a Windows desktop software which is used to issue card, a hotel app which is used to manage devices, a guest app which is used to unlock with phone. TTHotel System is an intelligent hotel management software which is suitable for centralized/ distributed hotels and apartments. The software consists of a web side management system and a tool APP, which includes various practical functions such as room, staff, intelligent hardware control and convenient check in It solves all kinds of problems encountered in hotel management and improves management efficiency It is centralized The best choice for intelligent management of hotels and decentralized apartments. Management system There is web management system and windows system for the Front Desk. There is app for staff. There is app for Guests. It is very portable for the boss to check the hotel status online, Home Here are six modules: Issue Card/Generate Passcode/Renew Card/View Card/Cancel Card/Messages/View Card Introduction/Init Card Encoder/ Feedbacks/ Scan the QR code If you are prompted to " unrecognized card encoder ", when you issue the card, you can click " Init Card Encoder " to initialize the card The card encoder should be initialized in this hotel system first.