X-Sense SBS50 base station for Link+ Pro wireless RF linkable (868MHz) detectors. The X-Sense SBS50 base station offers the possibility of WiFi network connection with a maximum of 50 X-Sense Link+ Pro wireless detectors on 1 base station. Attention : the SBS50 only works with a 2,4GHz WiFi network ! The SBS50 base station is also an alarm : if one of the detectors goes off, it gives an (adjustable) alarm of 100dB