The FV2 radio connector system is optimized for the wireless transmission of switching states in conjunction with battery-operated transmitters. Battery-operated transmitter with magnetic contact FV2 SM for monitoring windows, doors, etc. Easy to use as a cable replacement (input state on the transmitter is transferred to the relay contact on the receiver). Point to multi-point connection possible (one transmitter input controls several receivers). Several radio connections can be installed next to each other (individual addressing). Transmitter available with 230 V AC or with battery supply (12-24 V UC on request). Free field range 50m (no external antenna). In conjunction with the battery-operated FV2 SM radio connector system, for example, supply air monitoring, which is often required for closed rooms when operating extractor fans, can be implemented without laying cables. , Dimensions: 59.5x23.3x15.3mm, 3V DC, incl. magnet (item number for spare parts order: MIG100) and battery CR2032 (item number: BFS03B)