The Optima 6 is our smallest and least expensive 2.4 GHz receiver. Built on the same foundation as the Optima 7, without the full telemetry features, the Optima 6 is 20% smaller and weighs in at just slightly over a half an ounce making it perfect for smaller aircraft. Single Boosted Omni-Directional Antenna(BODA) System SmartScan Mode Selectable Low Battery Warning Telemetry Function Fail-safe/Hold Function Upgradable Firmware Specifications Modulation: 2.4 GHz AFHSS Conversion Type: N/A English Metric Size: 1.84" x 0.84" x 0.45" 46.00 x 21.00 x 11.00mm Weight: 0.54oz 15.00g Detailed Feature Descriptions Adaptive Frequency Hopping Spread Spectrum Technology (AFHSS) The Optima 6 utilizes our AFHSS 2.4Ghz technology and our exclusive Smart Scan system to ensure a rock solid, interference free connection. 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. Single Boosted Omni Directional Antenna (BODA) The Optima 6 receiver features our exclusive BODA receiver technology. Independent testing has proven that the single BODA antenna system in our 6 channel systems is equal to or better than our competitor?s dual antenna systems. Supplementary Power Connection (SPC) With our Supplementary Power Connection you can eliminate ?brown out? concerns by powering the receiver independently of the servos.