The signal repeater for the transmitters of the Mistral series. It is used to increase the range of the Mistral transmitters.Product features:Radio signal repeater Color: white plastic for all MISTRAL transmitters 500m* range, 868.35 MHzTechnical data:Technical data 500m* range Transmission frequency 868.35 MHz Power supply: Batteries 2 x 1.5V AA or 8-12V=/~ (via terminal) 20 transmitters can be taught-in For indoor use.Installation instructions:Note:*Walls, doors, metal parts, etc. can noticeably reduce the range! Max.: Connect 2 repeaters in a row