Allows discreet monitoring of door/window openings and closures. Easily pairs with Yale Sync Smart Home Alarm and mountable on any door or window frame. Features a 200m wire-free range and a battery life of up to 2 years. Sends low battery notifications...

Allows for discreet monitoring of doors, gates, entries and exits. Suitable for domestic or commercial properties with a long battery life. Features a highly extensive and reliable communication range. Mountable on metal surfaces. Contact has a powerful...

Are you worried about someone opening your doors or windows who shouldn’t be?Whether you want to make sure the kids aren’t opening a potentially dangerous window, or a potential thief is opening a door into your home, Hey!’s Smart Contact...