The Bold Smart Lock is a smart, keyless Bluetooth-enabled Euro cylinder. Using your iOS/Android smartphone, it detects your approach and activates automatically. If you lose your phone or its battery dies, you can still gain access using a pre-set backup PIN enabled by turning the outer knob. The Bold Smart Lock doesn’t require WiFi to work, has a 2-year battery life and is easy to DIY install. It features industry-leading security, with comprehensive customer support available.