[Tool] ruler, compass, level, noise meter, calculator
Who have Angeles the length of various ones, where the directionfrom any Knowing compass level that can give me holding ahorizontal noise meter can measure the noise of the currentlocation, to calculate a complex formula calculator can.

[Watch] stopwatch
LAP Time is Hakareru stopwatch.

[Life tool] flashlight \ mirror \ QR CODE Reader
Or brightens the dark, flashlight with flashing function can beconfirmed even distant place.
Make sure your face, and expansion can mirror.
Check the various QR CODE, moved or result value in the URL QR CODEReader that can COPY you Yes available.