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

A good quality economical alarm system.

Added to the original control system with no issues.

We are very pleased that our house is even safer now than it was before. Great system.

very good

Easy to install

I have 3 of these installed, I would say the realistic range of the wireless is 15m (in a house), not 30m as stated. Otherwise, extremely easy to fit and link up to the alarm.

Great price easy to add to an existing Yale alarm

Fast service, installed next day

I bought this to add to the new system I was having in stalled.

great product, installed really easily