25MHz Dual Channel Digital Storage Oscilloscope has 7.8 inch coloured LCD display. This Digital Storage Oscilloscope has external trigger. 25MHz Dual Channel Digital Storage Oscilloscope is designed by Amp Tronics Amp Tronics also develops custom solutions based on advanced technologies which include silicon, embedded hardware and software to full system platforms. The 25MHz Dual Channel Digital Storage Oscilloscope, Model PDS5022S, has maximum 6000 record length for each channel. This Digital Storage Oscilloscope has auto scale and waveform mathematic function. This Digital Storage Oscilloscope has PC communication through USBÿport for real-time data transmission. This Digital Storage Oscilloscope has trigger hold off function.