Signal Booster Feature: 1. The card position is progressively designed without damaging the remote control antenna, 2. Independent antennas, to install, 3. Bayonet design,2 pieces can be buckled, to carry and store, 4. Film protection,prevent from fingerprints,dust,scratches, 5. The surface is specular effect,very good reflecting effect,better signal boosting. Yagi Antenna Feature: 1. Exquisite and compact, easy to carry, copper post and silicone material, it will not affect the use after bending; 2. Enhance the remote control signal to effectively extend the flight distance; 3. Plug and play, simple and quick installation and disassembly, non-destructive installation design. 4.Only applicable to 5.8Ghz frequency, not applicable to 2.4Ghz frequency.