Eufy Security S230 Biometric Access Smart Lock - Black (T8520)Eufy Security S230 Biometric Access Smart Lock. Black version. Model: (T8520). Features: Your Finger is the Key: Smart Lock recognizes your fingerprint in just 0. 3 seconds and unlocks your door in 1 secondits faster than fumbling for your keys. Control From Anywhere: With its all new Wi Fi connectivity, you can control Smart Lock from absolutely anywhere via the eufy Security app. Always Has Your Back: Even when youre in a hurry, Smart Lock is ready