well whilst browsing?? found this!!
PowerBox RRS
Redundat Receiver System
The world's first redundant "standalone" receiver switch system RRS (premiered at the Sinsheim Fair in March 2007)
- selects the receiver with the best reception automatically and permanently
- all modulation modes can be used, all PCM, PPM and PPM-IPD
- all receivers can be used, JR Futaba, MPX, Graupner etc.
- all frequencies can be used, 35 Mhz, 40 Mhz, 72 Mhz, 2.4 Ghz
- compatible with all PowerBox systems
- Servos can be connected directly, even without a PowerBox
- no additional power supply is required
- ready for use without prior programming (in the case of the PCM, only the Fail-Save option need be programmed in the transmitter)
- weighs only 44 grammes
LCD display for reading out the following information:
- receiver function
- which receiver is active
- how many receiver switch-overs were made during the previous flight
- reception quality of both receivers in percent