Features: 100% brand new Antenna Range Extender Radio Signal Booster Function: Boost range/Amplify signal Radar antenna range booster、 Parabolic design、 According to the optical and analytic geometry Suitable for DJI Phantom 3S Standard Specifications: Material:Plastics、 metal Size:80 x 27mm(L x H) Note: This is a directional antenna booster、 it must allow a paste with aluminum foil facing aircraft will have effect. Dimensions: 3.15 in x 2.36 in x 1.06 in (8.0 cm x 6.0 cm x 2.7 cm) Weight: 0.78 oz (22 g)