Features: 1. 304 Stainless steel material, , A The color will not fade in 10 year.2. External power supply interface in case of dead battery. Low batteries alarm- When the battery power is less than 4.5V, the buzzer will prompt a warning . the battery Charged by 4 piece AA Alkline batteries, which can be used for 12 months3. Free-style handle Swing the handle up to turn the privacy deadbolt to double lock. Push the handle down to the door. Pls noted this can be locked automatically after you close the door. 4. Set Temporary passcode/cards/access to your guests and visitors. Send termporary passcode / ekey to vistors/guests from APP remotely even when you are out for travel, Never worry about your guest will be locked outside the door.After the passcode expired, the guest can not the door again. Which give a big conveniences for or Apartment owner because the guest will be check-out on time.5. Knows who comes with Door opening ( card/ fingerprint /pass code) records on App. Track who enters your home, and with keys for each user, you'll always know who opens your door and when. 7. Remote Control With our Gateway devices. Delete/change the passcode/ekey/fingerprint/card access remotely.Receive the door opening records instantly from App.Unlock Method: App Code, IC card, mechancial keyMaterial: 304 stainless steelApplication: Apartment, home, houses, School, HospitalColor: gold and silver