1. PCB uses immersion gold circuit board.2. All high-voltage capacitors are made of NPO materials, with a voltage resistance of 500V.3. All magnetic rings use Micrometre iron powder produced by German BASF6000, with super low loss and super low heat.4. All relays use AXICOM latching relays, produced in Switzerland.5.Built-in lithium battery 14500 (850mAh) X2. Note: If the battery is larger than 850mAh, it is a dummy battery.6. BNC female connectors, 50 ohm, pure copper material.7. Aluminum alloy shell, front and rear alloy panels are cut by CNC.Colour:blackMaterial:Aluminum alloySize:100 x 75 x 26mmPackage Contents:1 * ATU-10 Automatic Antenna TunerOnly the above package content, other products are not included.Note: Light shooting 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.