A high-precision calibration inst ent specially designed for amateur users, Professional design! Compared with similar products, its performance accuracy is better, featuring anti-magnetization.<br> Using three ceramic filter capacitors, professional signal processing chips and foam to reduce noise and shock<br> Excellent hardware design and analysis software<br> Can measure day difference, polarization, amplitude, frequency, dotted line, waveform graph and rise angle settings<br> Rugged and reliable housing made of hard plastic<br> Professionally integrated power amplifier operation circuit and vibration sensor, fully enclosed noise reduction and sound insulation cavity inside<br> The interior is composed of microelectronic circuits, which will not cause magnetization in tests<br> Can be used with desktops, laptops and tablets for Windows XP, 7, 8 and 10<br> Support for connection to Android cellphone to use<br> Colour:As Shown<br> Material:Plastic<br> Package Contents:<br> 1 * Watch Timegrapher Tester<br> Only the above package content, other products are not included.<br> 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.