This is the 2.4GHz AFHSS Hitec Optima SL S-Bus 8-Channel Single Line System Receiver.
FEATURES
Specifically designed for flybarless system helicopters
Dual BODA antenna system
Eight slots for PWM, two slots for batteries and one slot for singleline
Telemetry function
Fail safe/hold function
Supplementary power connection
SBus protocol for maximum compatibility
INCLUDES
Optima SL S-Bus 8-Channel Receiver, SPC Cable, BODA Antenna Holder and Instructions
SPECIFICATIONS
Operating Voltage: 3.7 - 9.0V (4.8 - 35V using SPC function
Dimensions: 1.89 x 1.12 x 0.60" (48 x 28 x 15.2mm)
Weight: 0.78 oz (22.1g)