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

I have it on my conservatory doors so i will know if anyone comes in without me inviting them in

very easy to fit ay a good price

Replacement for faulty unit. Perfect.

Perfect

Good

Cheapest from everywhere.Very good deal.

Quick delivery, good product

Good value for money

A good quality economical alarm system.

Great price easy to add to an existing Yale alarm