User Friendly action: Activate / deactivate by holding the power button, with straightforward controls for alarm configuration, screen lighting, and temperature scale selection Long Lasting Utility: Equipped with an integrated high capacity power cell indicated by color shifting power stage markers ( active / complete), ideal for extended use in workplaces, living spaces, or scientific laboratories Efficient power Management: Conserves power with configurable shutdown pauses ( 20 / 40 / 60 minutes or disabled), while the visible condition indicators display current settings for effortless Efficient: The GT1210 detector utilizes sensitive sensors for rapid measurement of multiple types, stable readings in various environments after a brief 60 second initialization phase Compact Versatile Unit: Lightweight ABS construction ( 8.5x5x2cm) with easy to read display offered in black / white / yellow preferences, excellent for portable assessment during inspections and environmental air analysis, Manufacturer: Whoasyst