Features: 1. This Is Used As A Measurement Tool For Swr (Return Loss, S11) Measurement, 2. Rf Filter In Pass-Through Mode, 3. Any Rf Network Impedance, Inductance, Capacitance Pass-Through, Etc. 4. 0.1-3000mhz Working Frequency 5. Professional Installation Is Required To Avoid Product Damage. Description: 1. Working Frequency: 0.1-3000MHz 2. Return Loss: Greater Than 35DB 3. Connector: SMA note: Depending on the batch, the appearance, color, and printing of the product may vary, which does not affect use. Size: About 45 x 90mm Material: PCB colour: As Shown Package Contents: 2 x Standing Wave Bridge Module Only 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.