Signal Booster for DJI Drone Controller Bundle:Silver 0 inch Central Hole Diameter:

0 inch Central Hole Diameter: 8mm

easy to carry and use

the car go backward only when car is stop and throttle stick is pushed from neutral zone to backward zone

Add Narrowband communication to your project with the MKR NB 1500

Signal Booster for DJI Drone Controller Bundle:Silver 0 inch Central Hole Diameter:Bundle 1: golden Bundle 2: Silver 1. Remote control signal booster, farewell accident Make up their own lack of remote antenna Improve the stability of a remote control signal plus lightweight, portable, durable, practical and convenient to use. 2. To improves both remote control and Wifi video connection performance, 3. Foldable Antenna Booster: Can not fit for Mavic Air Not include controller.