# Overview

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Charge Moasure Device</strong></td><td></td><td></td><td><a href="charging-moasure">charging-moasure</a></td></tr><tr><td><strong>Turn Device On/Off</strong></td><td></td><td></td><td><a href="turn-device-on-and-off-1">turn-device-on-and-off-1</a></td></tr><tr><td><strong>Understand LED Indicators</strong></td><td></td><td></td><td><a href="understand-led-indicators">understand-led-indicators</a></td></tr><tr><td><strong>Understand Reference Point</strong></td><td></td><td></td><td><a href="understand-reference-point">understand-reference-point</a></td></tr><tr><td><strong>Understand Accuracy</strong></td><td></td><td></td><td><a href="understand-accuracy">understand-accuracy</a></td></tr><tr><td><strong>Measuring Technique</strong></td><td></td><td></td><td><a href="measuring-technique">measuring-technique</a></td></tr><tr><td>Update Firmware</td><td></td><td></td><td><a href="update-firmware">update-firmware</a></td></tr></tbody></table>