ITEM NAME:Parabolic Signal Booster Enhance Board Amplifier for Drone Remote Controller Description: Made by top-quality copper and with mirror design, effectively prevent oxidation and improve the reflect, lasting effective and durable. 95% High reflectance increase more stable and stronger signal, improve the performance of both remote control and Wifi real-time transmission image for your drone. It fit on DJI Mavic 2 Pro/Zoom/Mavic Pro/Platinum/Mavic Air/Spark etc. controllers, also fits on all of controllers with antenna. Parabolic curved booster completely reflects the remote signal to the antenna, effectively to avoid signal problems due to the loss or fried machine situation. Film protection design, to for shielding fingerprints, dust and scratch. Please tear off the film on two sides of the booster before using. Specification: Material: ABS+ Copper Net weight: 21.80g Size Chart: Size: approx. 80 x 40mm/3.15 x 1.57inch Package Includes: 2 Piece Signal Boosters 8 Pieces Rubber Bands 1 Piece Manual Note: 1.Please tear off the film on two sides of the booster before using. 2. Under combination mode, please take care to use it properly. 3. Don't store the booster in a humid environment, otherwise, the metalmirror surface may rust, and will weaken the effect of the antenna signalbooster. 4.Do not scratch or rive the mirror surface of the metal mirror surface, otherwise, it will weaken the effect of the antenna signal booster..Film protection design, to for shielding fingerprints, dust and scratch. 2 Piece Signal Boosters. People always bought together with. 8 Pieces Rubber Bands.