1. Fresh air, clean air, creat a good atmosphere. 2. 3 timing mode. 3. Battery operated, work wirelessly. 4. Low noise. 5. Easy to install and operation.6. 2 choice for you. Can put it on desk or mounted on wall. 7. Coverage about 50m². 8. Convenient to charge with adapter, laptop or power bank. 9. Low battery alarm.● Can enhance energy and promote digestion, can relieve stress. ● Can calm nerves and help focus. ● Can reduce stress and improve skin conditions. ● Can improve mood and reduce anxiety. ● It can be used to treat headaches, nausea and skin health problems. ● Can resist infection and enhance immunity. ● Can help depression, childbirth and sexual desire. ● Essential oils are extracted from plants, which are naturally metabolized by the body. As long as they are used properly, they will not burden the body.