Campanello radiocomandato Grothe bianco Mistral 300M E

Product features:
- distance booster: You can get any range you like by linking several
  receiver / transmitter combinations
- 17 appealing polyphone melodies (2/3 tone, Westminster, Pop, classical,
  special tone sequence for people with hearing difficulties etc.)
- SILENCE-function with LED indicator ALARM-function with DIN
  emergency tone for special situations
- central paging: several receivers can be controlled by a single transmitter 
- individual paging: each receiver can be controlled individually by additional
  transmitters
- Matrix paging: combined central, individual paging is possible
Technical data:
- range: 250 m
- transmission frequency: 868.35 MHz
- volume: max. 86 dB (A)
- infinitely adjustable receiver: 4 x 1.5 V 
Note:
(model LR14/C, alkaline baby cell, not included in the scope of delivery) or 8-12V=/~