This product is made of high quality metal material, strong and . Test antenna technology standing wave, impedance, capacitance parameters. Measuring coaxial transmission lines (SWR, length, speed coefficient, approximate Q and loss, resonant frequency and impedance). Measure and determine the optimal settings for the tuning subsection: SWR, approximate Q, resonant frequency, bandwidth, impedance. Support for connecting USB cable (not included) through PC for measurement data waveform analysis. Size:90mm x 82mm x 30mm Colour:Black Material:aluminum alloy Package Contents: 1 x Antenna Analyzer 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.