JR® Dual Modulation Spectrum System (DMSS) 2.4GHz protocol offers a secure radio link that combines DSSS and FHSS capabilities into a wide-band transmission system that includes high-speed response and high resistance against RF noise. Another outstanding benefit is the JR bi-directional DMSS communication system and the real-time telemetry information it delivers. Receiver voltage telemetry is standard with every DMSS receiver, and add-on sensors will give you real time feedback of information from your model such as the RPM of an aircraft propeller or helicopter rotor blades, temperature and altimeter readings. Especially designed for the latest telemetry enabled JR radio control sets, including the XG6, XG8 and XG11, these easy to fit sensors will give you in-flight information from critical parts of your model. The lightweight sensors you choose can connect directly to the main DMSS receiver through a Y-harness or in series via the DMSS Telemetry Adapter (TLS1-ADP). The TLS1-ROT rotation sensor employs a Hall IC pickup system (magnetic) and has a measuring range of 300 to 40,000 rpm.