Easy-to-operate stopwatch. *Since it can be operated with the volume button, it can be operated without looking. *You can also use the remote control shutter or the earphone remote control. *Basic operation is possible only with the volume UP button. Since it can be reset with a long press, the basic operation of Start / Stop / Reset can be performed even when there is only one button like a remote control shutter. *Lap times that can be recorded almost infinitely can be transferred in CSV format, making recording convenient. You can create graphs by reading into Numbers. [Caution] ・ Depending on the device status, measurement results may contain errors. ・ The volume switch cannot be operated at short intervals of less than about 0.5 seconds. ・ Please check the terms of use (https://ra-labo.com/c-termsofservice.html) before downloading.