Smart Bluetooth Deadbolt Lock by iMagic, Smart Code Electronic Push Button Keypad with iOS/Android APP, Satin Nickel, Sliver, (iSL2S) SMART LOCK: Control access through your smartphone or the keypad. Works with iOS and Android. Push notifications alert your when your door is opened. AUTO-LOCK TECHNOLOGY: iMagic Smart Lock auto-locks behind you for peace of mind. Our smart lock comes with advanced Auto-lock technology, so your home is always secured. CONTROL ACCESS: One-time use electronic keys so users can schedule and grant keyless access to their homes for a set period of time. Up to 16 Users access code for others. SUPERIOR SECURITY: Bank Grade encryption and cloud managemen. Accord with BHMA Grade 3 standard Up to 12 months of use powered by 4 AA batteries (purchased separately)