With view key, you can switch 10 million units and scale of 3 digits with one touch
Calculation status display
Dual-power (2 power)_ _
Auto power off
Key roll over
Tax calculation, time computation, 10 million units, shift
The usability is good, it is still better if it is a little smaller, because I sold cheaper at other, so I was a little disappointed. I thought that it would have been nice if there was a light color cover so that it could be found easily in a bag or the like.