HVAC aroma Diffuser Machine: 1. Control: LCD screen + touch button, mobile App WIFI control. 2. Power: electric, 110-240V, 50/60 HZ. 3. Installation: Floor standing, or working with HVAC ( the best way). 4. Memory record: memory battery inside for save the time setting. 5. Work time: 5 working period time programming, 24 hours from Monday to Sunday, 10-200 seconds for choice for work / pause time. 6. Fan: No fan. 7. High quality: aluminum alloy atomization head, pump.