DSO mini oscilloscope,rising/falling edge trigger. Instruction: http://s3.amazonaws.com/s3.image.smart/download/101-10-156/DS211%20Instruction%20Manual.pdf
Compact rectangular housing, large display screen. Auto measurement: frequency/duty cycle, DC RMS voltage/Vpp /Vmax/Vmin.
Buttons on the side. Mini pocket sized, compact and lightweight.Synchronous mode: auto, normal, single, scan.
Store file as BMP, DAT, BUF, or CSV format. Use build-in flash disk to save/read waveform image.
Math waveforms: DATA, -DATA, Inp+D, Inp-D, -Inp. Output test signal: 10Hz-1MHz (1-2-5 sequence step).