Compro rolp solista sounder beacon compro rolpsbrlrd the compro rolpsbrlrd is a solista sounder beacon that consists of a siren and an integrated led flash light the use of beacons to supplement audible alarms is becoming increasingly common a combined sounder beacon allows both an audible and visual alarm to be provided but requires only a single installation point the led beacon has a dramatically lower current consumption than that of traditional xenon beacons making them ideal