SATEL MRU-300 Radio Signal Retransmitter - 433 MHz, 4-Channel, Wall-Mount

Security installers often face dead zones in large buildings where 433 MHz wireless detectors lose contact with the control panel. The SATEL MRU-300 radio signal retransmitter closes those gaps by receiving and re-transmitting signals from up to four wireless devices, effectively doubling the coverage area. It works with SATEL's 433 MHz ecosystem, making it a practical addition to any expansion or retrofit project.

Key specifications

• Operating frequency: 433.05 – 434.79 MHz
• Number of channels: 4
• RF output power: 10 mW
• Wireless range in open area: up to 1000 m
• Power supply: 12 V DC
• Current consumption: 25 mA standby, 100 mA maximum
• Operating temperature: -10 °C to +55 °C
• Maximum relative humidity: 93 ± 3%
• Enclosure material: plastic, IP20
• Inputs: 4 (for retransmission activation)
• Outputs: 4 OC type (for status indication)
• Antenna connector: SMA
• Modulation: FSK
• Mounting: wall-mount

Why choose it

The MRU-300 delivers reliable signal extension without complex configuration. Its low standby current of 25 mA keeps energy costs down, while the four OC outputs provide clear status feedback for monitoring systems. The compact plastic housing is easy to install on any wall, and the SMA antenna connector allows flexible antenna placement for optimal coverage.

Ideal use cases

• Extending range of SATEL 433 MHz wireless alarm systems in large warehouses or office complexes
• Industrial automation and remote monitoring where wired infrastructure is impractical
• Residential estates or multi-building properties needing seamless wireless coverage

Good to know

For best performance, pair the MRU-300 with compatible SATEL wireless detectors and controllers. Ensure the antenna is properly connected and positioned away from metal obstacles. The device is designed for indoor use (IP20) and should be mounted in a dry, accessible location.