Features 1、Can adjust the phase angle and gain to eliminate unwanted signals before they get to the front end of the receiver. 2、The built‑in PTT control can maintain the stable and efficient connection status of the silencer during transmission. 3、You can insert the QRM signal canceller into the feeder without any additional modification to the radio, very easy. 4、Comes with dial and knob pointer, the QRM signal silencer allows for simple adjustment by rotating the the knob. 5、The aluminium alloy shell is very sturdy and wear‑resistant, which also has great durability for a long service life. Specification Item Type: QRM Eliminator Material: Aluminium Alloy Function: Eliminator Colour: Black Frequency Band: 1-30MHz HF Package List 1 x QRM Eliminator 1 x Power Control Line