This is the EF-KIT2 version which uses the 868mhz band and has the newer touchscreen panel (rather than physical buttons). It can call up to 3 phone numbers in sequence if the alarm goes off. Apparently its easy to set up and is completely wireless which means no electrician needed.
Its already a good price, but you can get 5% off using the code "jansale" which is advertised heavily on their site.
There also seems to be an extra 5.55% TopCashBack but its under the name "The Safe Shop" when you search. Clicking out from TopCashBack takes you to the Safe.co.uk website.