PowerBox PBR-8E 8 Channel 2.4GHz Receiver for CORE & ATOM 8250PowerBox PBR 8E 8 Channel 2. 4GHz Receiver for the Core Radio System 8250 This is a eight channel receiver with two redundant receiver circuits. The unit features 8 PWM servo outputs and telemetry data for battery voltage and RF data. Features 8 Channel 2. 4GHz Receiver Two independent redundant receiver circuits Extreme interference rejection Ultra long range Reception quality and airborne battery voltage available via telemetry as standard Technical