This is the HTS-SS Blue C50 Basic Telemetry Combo from Hitec. FEATURES: May be installed in nearly all electric RC aircraft including helicopters, gliders and aerobatic planes Uses the Hitec Adaptive Frequency Hopping Spread Spectrum (AFHSS) that allows electric flyers to monitor a variety of information on the Hitec Aurora 9 transmitter or through a PC Two year limited warraty through Hitec beginning at date of purchase INCLUDES: #55834 3 Temperature Sensors, HRCM5834 #55850 50A Current Sensor, HRCM5850 #55851 Voltage Sensor, HRCM5851 #55849 Sensor Station, HRCM5847 jxs 12/13/11 ir/jxs