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

Easy to install and pair with the alarm panel. Quite a generous allowance between the reed and the magnet (25mm+).

Item was as described, quickly and easily installed

Easy to install and add to the alarm system, instructions good. No problems since installation.

handy extra sensor for other doors/windows

works perfectly and so simple to install

Simple add on to system.

works well , not much more I can say

Perfect for our Yale alarm. Easy to fit and does exactly what it should

Very good worked well with yale smart alarm

Easy to add. Less than 5 minutes to get it working.