Color Black + Orange Brand N/A Model SPD201/O2 Quantity 1 Piece Material ABS plastic Detection Range 0~25%VOL Screen Size 1.7 inch Battery Number 3 Powered By AAA Battery Battery included or not Yes Other Features Application: Office workplace or other oxygen content measurements Oxygen maker plant to detect the content Train car compartments oxygen content detection Mine inner oxygen detection; Using intelligent design to achieve multiple functions; Backlight included convenient to use in the dark; Sound and light alarm easy setting; Insufficient power reminder on the screen; Ergonomic design easy to use; Accuracy: +/-0.5%. Certification CE / RoHS Packing List 1 x Oxygen detector 1 x English user manual 3 x AAA batteries