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

Added to our system and work perfectly. Batteries run out quite quickly

Great price easy to add to an existing Yale alarm

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

Added on easily and works as expected

Works, but it is a shame they are so chunky

Very good worked well with yale smart alarm

Good value for money

Does what it is supposed to do. On first ordering three of these and a remote keypad I received instead four of these and no keypad. A short conversation resolved the mistake and I had the missing keypad within 48 hours and the fourth contact free as compensation.

Did not work waste of money

These contacts are only suitable for window and door frames that have a flat profile, my window and door frames have a contour which prevenst the two parts (magnet and sensor) from aligning so I cannot use these.