Hobby-Ace&reg; Light L250 5.8G 250mW VTX FPV Transmitter For Gopro Hero33+4 Camera 5.6-5.9GHZ Super light:7 grams With 32ch,and new LED show you with frequency you are working at.Direct connect to Go-pro Hero3 and 3+. Work on 3.7v one sell battery.you can use tiny cambers to support it work for long time,500mAh work for 1.3hrs. SMA connector,we suggest you to chose the short type of Clover Leaf antennas. Great to work with DJI 2-Axis and 3-Axis Brush less Gimbals.Use a sticker to stick battery to the back of the gimbals to get balance