Feature:1. SUPPORT ANTENNA: Used as a support antenna for the radio, and the antenna produced has an excellent integrated circuit2. MAIN APPLICATION: This Tuned antenna can be used for indoor short wave reception and has a long service life3. HIGH PERFORMANCE: This shortwave antenna, with 2.330MHZ frequency coverage and excellent performance4. STAINLESS STEEL: Ring body is made of stainless steel, and the workmanship and reception belong to the middle and high end of the similar5. BASIC SPECIFICATIONS: The impedance is 50ohm, the gain is 20dbi, and the feeder line is BNC3.5, BNCBNCSpecification:Item Type: Receiving Frequency: SW 2.3-30MHz (Main Adaptive Frequency)MW 522-1710KHz (The supporting radio needs to have medium wave input interface)Impedance: 50ohmGain: 20dbiReceiving Circle: Circle Diameter: Approx. 20cm / 7.87inAntenna Box Size: Approx. 10.5 x 6.5 x 2.6cm / 4.13 x 2.56 x 1.02inBattery: Built in Lithium Battery 1000mAhFeeder Line: BNC-3.5, BNC-BNCUSB: Standard Type C Charging PortMaterial: Stainless Steel.Package List:1 x Receiving Circle1 x Antenna Box2 x Feeder Line (BNC-3.5 and BNC-BNC)1 x BNC Female to SMA Male Connector1 x Data Cable1 x Chinese English User ManualNote:The power control box contains 1000mAh lithium battery, which is charged as type C, and the light automatically changes color when fully charged.When using, it is necessary to avoid chargers, air conditioners, led lights, microwave ovens, refrigerators, charging piles, high voltage lines or transformers, and try to place them in open and well‑ventilated places; In addition, when the noise is larger, the frequency can be slightly adjusted to the appropriate position.