I bought this as an addition to an existing Yale system I had installed in my house in Spain.

It was very easy to fit and to link up to the existing system.

I would just give a warning however that the different Yale systems can be quite confusing.There is the Easy fit system and the Sync system.It is easy to make a mistake and order the wrong accessory .Unfortunately the two systems are not compatible with each other.I purchased an additional PIR sensor and bought the Easy fit one in error.It took me some time and phone calls to Safe and Yale to discover my mistake.Because I had opened the package and tried to install it it could not be returned.

Both Safe and Yale were very helpful but be careful not to make the same mistake which was only apparent when I tried to link it to the existing system.There should be some clear advice or note of caution on the website in my view

I bought this PIR as an add in to my existing system, it works perfectly and was very easy to install and sync.

First class product easily fitted and paired with the system, no problems encountered, would recommend to anyone wanting to expand their Yale system .

I had purchest previously so required one more. More than happy with the product and the company of supply. Thank you