【4-in-1 Unlocking Modes】 This smart door knob offers 4 versatile unlocking methods, covering all your daily needs. It is ideal for homes, studios, and offices. 【Local Data Storage】 You can store up to 100 access codes and 100 fingerprints. All data is saved locally—no cloud dependency—effectively preventing data leaks. 【Larger & More Accurate Fingerprint Sensor】 Equipped with an expanded, high-precision fingerprint sensor, it ensures faster and more reliable recognition. It boasts a 99% fingerprint recognition rate and unlocks in just 0.5 seconds. 【Universal Installation】 No need to distinguish between left-handed and right-handed doors, nor modify the existing door hole. It can be installed directly with simple steps. 【After-Sales Support】 If you encounter any issues during use or installation, please contact us, and we will reply in 8-12 hours. 4-in-1 Smart Fingerprint Door Knob Lock(Fingerprint/Code/IC Card/Key), No App Required, Door Locks for Bedrooms & Offices, Finger Print Door Knobs with Code & Keypad, Biometric Thumbprint Door Knob