Read the review on Oscar Liang’s blog, this is supposed to be the smallest SBUS/CPPM receiver that gives you the full range and telemetry in one package.
Sounds big, but it comes with a 20mmx20mm mounting hole form factor, kinda stack on top of a Furious Piko board.
● Smart Port enabled.
● S-BUS/CPPM output (BLUE LED stay lit indicates XSR-M in S-BUS mode, otherwise in CPPM mode)
Compatibility: FrSky X Series Module & Radios in D16 mode
Channel: XSR-16CH(1-16CH from SBUS channel,1-8ch from CPPM Channel)
Dimension: 20x20x1 mm (LXWXH)
Operating Voltage Range: 4.0~10V