1. Band stop filter can block the FM transmission band between 88108 MHz, practical and useful.2. When the attenuation exceeds 50dB, the broadcast frequency band is blocked between 88 ~ 108 MHz.3. FM filter can be small and convenient, and quality is guaranteed, you can use it with .4. Designed for maximum attenuation 88108 MHz and the maximum attenuation between the 3dB roll point is 76 MHz and 122 MHz.5. The insertion loss is less than 0.5 dB between 0 and 1 GHz, and mostly less than 1.5 dB between 1 and 3 GHz.Item Type: Band stop filterInsertion Loss: Less than 0.5 dB between 0 and 1 GHz, and mostly less than 1.5 dB between 1 and 3 GHz.Broadcast Frequency Band Blocked: When the attenuation exceeds 50dB, the broadcast frequency band is blocked between 88 ~ 108 MHz.Function: Designed for maximum attenuation between 88-108 MHzMaximum Attenuation Between 3dB Roll Points: 76 MHz and 122 MHz.Colour:blackMaterial:metalPackage Contents:1 x Band Stop Filter1 x ConnectorOnly the above package content, other products are not included.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.