1、The Work Tips: The best efficiency is at 20 meters distance, which is in lower performance at 40 meters and 10 meters. 2、Practical Use: Works perfectly as reception antenna accessory for both indoor and outdoor use, also suitable for DIY. 3、Better Design: There is a BNC female interface on the board, and you can use to it connect a tuner, easy and reliable. 4、Good Material: Combining high quality resin and copper materials, not likely to malfunction, has excellent durability. 5、Easy to Install: Comes with a 16.5m red line and a 10m blue line, the simple installation can be quickly completed. 1 x SDR Antenna Module2 x Connecting Cable Item Type: SDR Antenna ModuleMaterial: Resin, copper. Maximum Power: 10WRed Line Length: Approx. 16.5m / 54.13ftBlue Line Length: Approx. 10m / 32.81ft