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 3‑30MHZ frequency coverage and excellent performance4. STAINLESS STEEL: 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 BNC-3.5, BNC-BNCSpecification:Item Type: Receiving Frequency: 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 SteelPackage 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.