WiFi Smart Door Lock Right Handle, Available in Black and Silver. FIVE WAYS TO UNLOCK - ENER-Js Smart Door Lock will automatically relock after every time the door is used. Approved guests can unlock using fingerprint, ENERJSMART app, user password, RFID card and mechanical key; Support up to 3 master code,100 fingerprints and/or 100 RFID cards (Recommended Operating Temperature: >= -13?). Doorbell function, voice guide for easier and more convenient use. Suitable for 35-100mm door thickness. ENERJSMART APP MONITOR ACCESS REMOTELY - The ENERJSMART app is designed for iOS and Android devices and gives you easy door access and tracking abilities. You can view the access logs in the app for detailed information about who has opened your door, at what times, and how they gained access. EMERGENCY CHARGING AND POWER-SAVING - Equipped with emergency charging port and back up charger. Dont need to worry about being locked outside as you just need 4 pieces AAA batteries to get it back