Purification with negative ionsThree adjustable purification modesWith bass function, no noise when workingActivated carbon filtration Adopting professional filtration and sterilization technology to of your family's health.FUNCTION OPERATIONBUTTON M FUNCTION: Click the " M " button for the first time to turn on the automatic mode. and t he fan willautomatically switch gears according to the air quality; Click the " M " button a second time to start manual mode one gear , Click the " M " button a third time to switch to manual mode second gear Click the " M " button forthe fourth time to switch to manual mode third gear Click the " M " button for the fifthtime to turn off the machineNegative ion function: Long press the " M " button for thefirst time to turn on the negative ion; Long press the " M " button a second time to turnoff the negative ion; Night light function: Double-click " M " for the first security checkto turn on the night light Double-click the " M " security check for the second time , turnoff the night lightsize: 16 x 16 x 26.8cmMaterial: ABScolour: greyPackage Contents: 1 x Purifier1 x Data CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.