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

Door/ window alarm sensor

Excellent. Battery life short.

Paired easily with current Yale alarm

OK and with just about enough range to cover a shed 20 metres away. Easy enough to add to system.

Excellent! Fast delivery!!

Exactly as described and easy to install

Does the job

Easy to fit and program ..spot on

Good product

Cheapest from everywhere.Very good deal.