1. Professional and elegant design by famous designer. Elegant, exquisite, compact and stylish. 2. Anviz optical fingerprint reader. Scratch-proof, unbreakable and durable. Well accept all kinds of fingerprints. 3. Strong zinc alloy front panel. Waterproof. Stable and reliable. 4. Single latch for easy installation. User can change the handle direction. DIY design. 5. Independent clutch motor design. Reversible handle. Free rotation. 6. LED indicator and inbuilt musical buzzer. 7. Identification method: Fingerprint, card. Safe and reliable. 8. Backup mechanical key for emergency open 9. Unique RF key design, caring for the elder people and children in your family. 10. Unique function of temporary user management. Temporary enrollment for babysitters and visitors. One-key deletion. 11. Extendable RFID, Mifare or HID card. 12. Special free entry design for office. Can be set on the lock when needed during meetings etc. 13. USA Ti chip of low consumption. 4 AA batteries for one year (30 times door-open/day). 14. Low voltage alarm. 500 door-open still available. External 9V battery for emergency use. 15. LED indicator and inbuilt musical buzzer.