SC2000 5.8G Circular Polarized Antenna Set Transceiver Kit SMA (Male) Material: Plastic + Aluminum. Package: 1 x TX Antenna & 1 x RX Antenna Compatible device: RC Airplanes Functions: Transmit and receive Other Feature: With good performance as a transmission antenna; Min SWR:1.2; Gain:~1dbi;Direction:all;Compatible with Video transmitter; TX 5.8G SWR&lt;=1.5 Length:80mm Weight: 8g; RX 5.8G SWR&lt;=1.5 Length:90mm Weight: 6g;