Yale EF-DC Easy Fit Alarm Door/Window Contact, White, DIY Friendly, Accessory for SR & EF Alarms, Suitable for Main Access Points

Great device. Easy fitted easy configuration

Excellent

Work well and are easy to link to the alarm controller but rather obtrusive on a window frame. It would be nice if they came in brown as well.

Works great with the Yales Smart alarm. Easy to pair

Really easy to fit and link up to my current alarm system. Needed to replace the old door contact and it was a like for like replacement, so all very straight forward. Peace of mind again.

This was a replacement as the magnet on my old one failed. It would be good if you could buy the magnet separately.

Very professional and easy to use

Added on easily and works as expected

Addidional kit. Slotted straight in. Easy to use and set up. Pleased.

do the job