SYNC ALARM ACCESSORY: This Panic Button is easy to pair with your Yale Sync Smart Home Alarm through the Yale Alarm App. SYNC ALARM PANIC BUTTON: Immediately triggers your alarm in an emergency when pressed for 3 seconds. DISCRETE MOUNTING: Supports multiple mounting options, so you can mount on a wall , under your desk or in another discrete location. Can also be used as a mobile panic device. EASY TO SET UP & INSTALL: Link to your Yale Sync Smart Home Alarm straight out of the box. Completely wire-free, with no need for cables running through your home. You can attach to any surface, either via a screw or sticky-back for greater convenience. EXPANDABLE SYSTEM: Extend & customise your Yale Sync Alarm, by adding up to 40 accessories.