Feature: 1. Stable Working: You can rotate the directional antenna to align dummy point with interference signal and minimize the certain near field interference. 2. Wider Coverage: Comes with 0.5-30MHz coverage range, the loop antenna can reduce noise as well as improving the signal to noise ratio, very useful. 3. Good Receiving: The local radiated noise suppression can get up to 30 dB, which allows you to quickly find weak signals that are submerged by noise. 4. Great Material: Mainly made of high quality ABS and stainless steel materials, very easy to maintain, has excellent durability for long term use as well. 5. Easy to Install: Can be fixed for outdoor use for a long time, and you can flexibly install it on balcony, rooftop and other places for signal receiving. Specification: Item Type: Loop Antenna Material: ABS + Stainless Steel Working Voltage: 9-14V Power Supply Mode: USB Feeder Line Length: Approx. 10m / 32.81ft Primary Coverage: 0.5-30 MHz. Package List: 1 x Antenna Main Body1 x Loop Oscillator Note: 1. Do not connect it to the transmitter, as it will cause damage to the preamplifier. 2. You need to prepare a PVC sheath for support, at any diameter but has a certain strength. You can also use existing bamboo poles, wooden poles, etc., be careful not to use metal poles.