Single sound emitter. Programmable model. Power voltage 6 / 12 / 24 / 220 V.
Single sound emitter. Programmable model. Connection via three-wire power and signal line SENS.
Single sound emitter. Low power consumption (not more than 400 mW) Powe voltage from 6 up to 40 V.
Single sound emitter. The unit might be programmed. Power voltage - 24 V.