Usage Tips:Features: 1. Convenient To Carry And Easy To Use 2. Applied To AM Signal Envelope Detection: This Product Uses A Voltage Doubler Detector (Composed Of Two Reverse Microwave Diodes), Which Is Twice As Sensitive As A Single Tube Detector (6DB). 3. High Sensitivity (Typically -30DBM, Even -40DBM), 4. It Is Not Comparable To Ordinary 2AP9, 1N60. 5. It Can Be Directly Used To Detect The Level And Amplitude Of Carrier Signals, Which Is Equivalent To A Detector. Description: Model: RF Module Material:PCB colour: As Shown Package Contents: 1 x RF Attenuator Module Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use 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.