http://www.bevrc.com/low-pass-filter-p-250.html
Product Details
1400Mhz Low pass filter, can minimize the affect of 0.9G, 1.2G, 1.3G video Tx to the 2.4G radio Rx or GPS.
Insertion loss : less than 0.8dB.
Attenuation: 1.6G---- -25dB
2.4G---- greater than -40dB
SMA connectors (male / female).
Inserts between transmitter and antenna.
Characteristic impedance 50Ω.
Handles RF power up to 8 watts.
Small size, Lightweight.