Asakuki Rock 500ml Essential Oil Diffuser

Quiet Unit – Pretty much the same as my square Wifi unit , apart from the fact this is a hand control which works on a beep system , so I found myself having to go back to the booklet to remember what the beeps meant . I would like to see a stronger delivery system, maybe the heater type is better but it just seems to me that the mist comes out and falls to the ground quickly and you do require more than just a few drops of oil . I am pretty sure the Ultrasonic delivery system is coming out of the same factory regardless of brand , so price might not be the ultimate guide . The unit is 500ml which is more than enough to run all night and it's quiet as well .I could not detect any noticeable noise coming from the unit except for what I assume was water droplets condensing and falling back into the resevoir