Features Adaptive Frequency Hopping Spread Spectrum Technology (AFHSS) The 2.4GHz system utilizes the latest AFHSS technology and Hitec's exclusive Smart Scan system to ensure a rock solid, interference free connection between the transmitter and receiver. When selected, Hitec’s 2.4GHz SmartScan function scans the 2.4GHz spectrum to find the cleanest channels in which to operate therefore providing interference free operation even in the most crowded environments. Boosted Omni Directional Antenna (BODA) The Optima 2.4GHz line of receivers feature our exclusive BODA receiver technology. Boosted Omni-Directional Antenna (BODA) System SmartScan Mode Selectable Basic Telemetry Function : RX Low Battery Warning Range Check Mode (Reduced output to approx. 30M range) Fail-safe/Hold Function Specifications Modulation: 2.4GHz AFHSS Conversion Type: N/A Size in Inches: 1.84 x 0.84 x 0.45 Size in Millimeters: 46.74 x 21.34 x 11.43 Weight ounces: 0.54 Weight grams: 15.31