PowerBox PBR-5S 5 Channel 2.4GHz Micro-Receiver for CORE & ATOM 8230PowerBox PBR 5S 5 Channel 2. 4GHz Micro Receiver for CORE & ATOM Radio System 8230 This is a five channel receiver with a single receiver circuit. The unit features a PBUS interface for servo and telemetry data, while its minuscule size makes it the natural choice for small models. Output 5 can be set to S. BUS, SRXL or PPM signal from the transmitter; typical applications include use with flybarless systems or flight simulators Features: 5 Channel 2.