The Tessi Key Storage Unit Smart Large allows you to share temporary or permanent codes via Bluetooth or keypad codes with invited guests. The Smartlife App records all Keyminder openings, providing a comprehensive log of access activity. In the event of drained batteries, a separate cable access emergency power point ensures reliable back-up. The extra large compartment features 2 hooks for storing multiple keys and has an IP65 weather rating, making it suitable for outdoor use.