Features:<br> 1. Convenience: The QRM canceller is inserted from the into the feeder of the antenna without any other modification to the radio.<br> 2.PPT Control: The box has a built-in PTT control to keep the canceller connected during mission. However, an additional auxiliary receiving antenna is required, such as a 2m antenna or only a few meters of wire in the shed. The two antennas receive unwanted signals, resulting in different phases.<br> 3. Adjustable: Allows adjustment of the phase angle and amplification to eliminate unwanted signals before reaching the front end of the receiver! It is based on a completely innovative concept and cannot be compared with normal "silencer" performance.<br> 4. Material: The material is excellent, the shell material is aluminum shell, and the front and rear baffles are: epoxy glass fiber board FR4.<br> Specification:<br> Connections: Main Antenna, Auxiliary Antenna and 3xBNC for<br> RCA jacks for PTT are: approx 5.5x2.1mm<br> Required power supply: 13.8V/150mA<br> Size: about 124x113x51mm/4.88x4.45x2.01inch<br> color: Black<br> material: metal<br> Notice:<br> 0.5-1mm deviation between dial and knob pointer<br> Package Contents:<br> 1 x QRM Eliminator<br> 1 x PTT Wire<br> 1 x FM Rod Antenna<br> 1 x Power Cord<br> 3 x F Adapter UHF/SL16-SMA<br> Only the above package content, other products are not included.<br> 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.