1. The two antennas receive unwanted signals, resulting in different phases. 2. The QRM eliminator is inserted from the antenna feeder without any additional modifications to the radio. 3. It is based on an innovative concept designed to improve signal clarity. 4. The QRM eliminator allows adjustment of phase angle and amplification of unwanted signals before they reach the receiver front end. 5. Features built-in PTT control that keeps the eliminator active during transmission. Additional auxiliary receiving antennas are required, such as a 2-meter antenna or a few meters of wire placed indoors. Power supply: 13.8V/150mA PTT jack Frequency range: 1.8 MHz - 30 MHz Color: Green Material: PC + metal Package Contents: 1 x Eliminator (welded) Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement error allowance is +/- 1-3 cm.