Features GOOD PERFORMANCE: The loop receiving antenna helps to reduce noise and improve signal to noise ratio, with local radiated noise suppression up to 30dB. FOR RADIO: For HA SDR short medium wave radio, this active antenna is an effective antenna for short wave listener (SWL) and amateur radio (HAM). RECEIVING METHOD: By rotating the antenna, the virtual point of the antenna is aligned with the interference signal to receive the signal, efficient and stable. EASY INSTALLATION: The active receiving antenna has a compact structure, and can be easily installed on balconies, roofs, etc., and does not take up space. WIDE APPLICATION: This loop antenna has 10 meter cable, the main coverage range is 0.5‑30MHz, built in low noise amplifier, has a wide range of applications. Specification: Item Type: Active Loop Antenna Model: XR 119 Material: ABS Main Coverage Range: 0.5-30MHz Supply Voltage: DC 5-12V Package List:1 x Antenna with 10 Meter Cable1 x Stainless Steel Vibrator1 x Biased Ball Seat1 x USB Data Cable1 x SMA Jumper Cable Package List 1 x Antenna with 10 Meter Cable 1 x Stainless Steel Vibrator 1 x Biased Ball Seat 1 x USB Data Cable 1 x SMA Jumper Cable