Volcano Flame Effect Diffuser

Volcano pairs a flame effect light with a fine aroma mist, so a single unit works as both a scent diffuser and a soft, moving glow. The flicker is made by light rather than any real flame, and it rises through the top of the unit while the mist drifts out alongside it. In a dark room the effect is closer to a candle than to a lamp, which is what makes it sit well as a centrepiece on a table.

The tank holds 130 ml, enough for six to nine hours of running on a single fill, with a mist output of 15 to 20 ml per hour. The ultrasonic mechanism stays quiet in use, measured under 28 dB, so it does not intrude on a room at night. Power is over USB, and the flame effect is adjustable, so it can be taken down to a low night light or turned up on its own.

Because it runs on USB it moves easily between a bedside table, a living room shelf, a desk or a dining table. Use clean water with a few drops of essential oil, and empty the tank when it is not in use so the reservoir stays clean. Keep it on a level surface away from the edge, and treat the scent as atmosphere in a room rather than as a remedy of any kind.

• Capacity: 130 ml water tank
• Mist: Ultrasonic, under 28 dB
• Mist output: 15 to 20 ml per hour
• Run time: 6 to 9 hours per fill
• Night light: Flame effect glow, adjustable
• Power: USB
• Use: Water plus a few drops of essential oil