[ WIDE COMPATIBILITY] The R81 model works with multiple indication types including D16 and SFHSS standards, providing flexible connectivity for both professional photography and hobby flying setups with consistent function [ LIGHTWEIGHT BUILD] At just 2g weight and 17x11mm size, its compact PCB design lowers aircraft load while increasing durability and running time [ LONG DISTANCE CONNECTION] With over 1000m working extent, this small unit keeps strong linkage even in open areas, ideal for remote photography tasks without breaks [ CURRENT LINK] Provides RSSI strength reading through SBUS Channel 9 output, giving connection tracking for skilled users to maintain and reliability [ EASY INSTALLATION] Includes a 6cm flexible for simple setup requiring denial additional tools, allowing fast preparation and better workflow