Thanks for your contact and purchase.
First of all, customers need to be aware that Okaysou AirMic4S and Okaysou AirMax8L have a sleep mode, while Okaysou Smart AirMax10L Pro has an energy-saving mode. The products are different, so the operating performance in sleep mode or energy saving mode is also different：
1.In sleep mode, the button lights of 4S and 8L are completely turned off；
2.In the energy-saving mode, when no pollution is detected for 30 minutes,the air purifier will stop work automatically for saving energy consumption.