The Friedland Response SA range of intruder alarms and accessories operate on the 433MHz frequency.
The Response SL range of intruder alarms and accessories operate on the 868MHz frequency with a long operating range of up to 125 metres. The Response SL range is fully compatible with the Friedland SK range of alarms and accessories.
Note: 433MHz and 868MHz Alarms and Accessories are NOT inter-compatible
Click here for our Alarm Comparison Chart