OWONHDS242 Handheld Oscilloscope, 40MHz Bandwidth 2 in 1 Digital Multimeter Oscilloscope, 20000 Counts with 2 Channel USB Type C and 3.5 Inch LCD Display (oscilloscope+multimeter)

After returning 4 scopes before this one due to missing items, batteries not charging, probes not working and mode failure. I finally got one that works as intended. Quality control on these scopes needs to be better as it's hit and miss. Check yours is working properly before return window is closed. Unfortunately I need this for minor electronic calibration which it meets my needs or I would have chosen a much better brand

Unless plugged it won't stay on,