Handheld, high-accuracy frequency counter with portable design High time resolution of 40 ps for precise measurement results Capable of measuring frequency, time, phase, and count with gapless intervals GPS locking feature to sync internal clock to GPS time signal (UTC) Clear 4" touchscreen display and USB interface for remote operation and data retrieval Handheld, high-accuracy and affordable frequency counter. Since this counter is portable, it is versatile and the high time resolution of 40 ps ensures highly accurate measurement results. The counter has a wide range of functions and can measure frequency, time, phase, and count with gapless intervals. Due to the gapless intervals, the tinyGTC delivers reliable results for ADEV measurements, which is a unique feature. Moreover, the frequency counter can be locked to a GPS location to sync the internal clock to a GPS time signal (UTC). This ensures a high long-term accuracy of the measurements. It has a clear 4" touchscreen which shows all relevant information for operation. Furthermore, there is a USB interface with which the counter can be operated remotely, or to read out measurements with a connected device. The frequency counter has a micro SD card slot, which can use cards up to 32GB to store measurement data. The developer has set up an extensive wiki page with all the necessary information and specifications. Due to its small size and low cost, it is not as well protected against overloading as larger, more expensive counters. Color: Black Material: Metal+ABS Package Contents: 1 set of ZC412 Frequency counterdual Timer 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.