The core uses a NE592D chip (SOP-8 package) manufactured , ensuring stable performance and excellent gain. We strictly prohibit new, refurbished, or worn-out chips The compact design and removable ring easy to fit in a backpack and quickly set up indoors or outdoors, eliminating space limitations Operating current is only 14-16mA, and a single 9V battery provides up to 20-50 hours of continuous operation, making it economical and Covers a wide range of major reception bands, including MW, SW, FM, and The included 1-meter SMA cable ensures seamless compatibility with most radios and SDRs on the market, ensuring easy connection Amplifier Chip: NE592D Battery Model: 6F22 (9V square battery, one included) Operating Voltage: 6V - 10V DC Operating Current: 14mA - 16mA Flight Time: Approximately 20-50 hours (depending on battery capacity) Ring Diameter: 30cm - 40cm (adjustable) Feeder Cable: SMA Female Pin/Female Thread (1-meter cable included, same type on both ends) Recommended Reception Bands: MW Medium Wave: 526.5kHz - 1606.5kHz SW Short Wave: 3MHz - 30MHz FM Radio: 87MHz - 108MHz Aviation Band: 116MHz - 136MHz Important Note: This antenna is for receiving only, not transmitting (The product printed words depending on the batch, but this does not affect use) Color: As Shown Material: PCB Package Contents: 1 x Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.