Features: 1. Use A Special Probe For The Needle To Perform A Low-Resistance Fixture; 2. The Probe Part Can Be Elastically Stretched. 3. Electric Field Probe 4. SMA External Screw Internal Hole Interface 5. Professional Installation Is Required To Avoid Product Damage. Description: 1. Electric Field Probe 2. Interface: SMA External Screw Internal Hole Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use size: About 110 x 12.5mm Material: PCB colour: As Shown Package Contents: 1 x Conduction 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.