4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA Temperature-controlled warm air:The product delivers warm air into the ear cavity to gently and effectively dry the ear canal and evaporate excess moisture.This feature provides a safe and efficient means to dry the ears after swimming, showering, surfing, or any othe rwater-related activity.The temperature of the air is controlled to ensure safety to the user.<br> 650nm red light therapy:Red light therapy is a safe,non-invasive treatment that has been shown to promote skin health<br> Colour: A black grey / B silver<br> Material:ABS<br> Instructions<br> 1. Remove dust cover from the earpiece, rotate the rotating head 90°.<br> 2. Long press the power/wind speed button until the device starts up (about 1.5 seconds), and the wind speed will be displayed as 1 gear, and the temperature gear will be displayed as "CO" (cold wi nd gear).Continue to press the power/wind speed button, and the wind speed will be displayed as 2 gear.<br> 3.Tap the power button to toggle the 650nm red light ON and OFF.<br> 4. Gently press the temperature button, the display temperature is 38 C (wait for about 10 seconds) then gently press the temperature button, the display temperature is 42 C, and so on. the third grade temperature cycle (CO, 38C, 42C).<br> 5. Gently insert the earpiece into the ear and hold steadily so air flows freely into the ear cavity.We recommend drying intervals of 1or 2 minute perear.<br> 6. When you have finished drying your ears, press and hold the power button until the device turns off.<br> 7. We suggest cleaning the earpiece after each use by wiping down with clean cloth or alcohol wipe.<br> 8. Re-attach the dust cover for storage.<br> Package Contents:<br> 1 * ear dryer<br> 1 * charging cable<br> Only the above package content, other products are not included.<br> 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.