Note: It's a DIY kit, you need to solder it to the PAX100 by yourself. Radioddity LPMX2 Low Pass Filter is designed for Radioddity PAX100 RF power amplifier and other devices, mainly used to suppress transmitter harmonics during transmission and reception. It also provides some pre-selection filtering on receive. Specifications Frequency Range: 120M, 40M Input Power: 100W CW, 200W SSB Harmonic suppression: >30dB Power supply voltage: 12V-16V Working current: 100ma Working temperature: -15℃~55℃ Storage temperature: -30℃~75℃ Warning 1. The filter is designed for the PAX-100 and achieves the best performance with it. 2. When used with other radios or devices, slight degradation of performance can be expected. 3. Working Voltage: 13.8V | Working Current: 0.1- 0.5A 4. Maximum Input Power: 100W for CW, 200W for SSB. Exceeding the rated power levels may cause damage to the filter. 5. Harmonic suppression: 20M, 40M>30db What’s in the box 1 x Radioddity LPMX2 Low Pass Filter