How do I charge my sensor? Where is the charging cable?

The sensor does not come with a cable, but you can use any ordinary micro-USB cable, such as is used with many smartphones. The rightmost (red) LED will light, indicating that it is charging. That LED goes out when the sensor is fully charged. You can check the charge level in the app, in the Settings screen. The sensor may not work well if the level is below 35%. It should do about 1,000 scans on a full charge.

Do not scan while charging; that can cause electrical interference with the scan.