Electronic smart door lock: 1. Electric mechanics integration, highly integrate. 2. Inductive, untouched, prevent wear, long service life. 3. Controlled by electricity, open very quickly. 4. Use rechargeable li battery, no need to change battery. 5. Manage conveniently, with inquiry, report loss, delete black list print, and statistics functions etc. 6. It keeps the unlocked function of the spare mechanical key. 7. You can choose the remote controller for it. 8. Suit to environment rainproof, waterproof; defend the sunshine from direct radiation. Electric parameters: Input voltage: dc12v Static current: