Aroma Home Harmony USB Colour Changing Ultrasonic Diffuser This Harmony Colour Changing Ultrasonic USB Diffuser releases a cool and calming scented dry mist which is sure to relax you when you need it most, and it purifies the air too – perfect for aromatherapy treatments. Simply fill the diffuser tank with water and your favourite essential oils (sold separately). The humidifier lasts up to 2 hours, and it also includes an auto shut-off feature when your water tank is empty. This sleek and modern ornamental piece has a curvaceous wooden-look exterior with an attractive wooden grain and looks fabulous on your shelf or mantelpiece, complementing any home décor scheme. You can also choose a soothingly hypnotic light display that cycles through a multitude of colours akin to the Aurora Borealis, or choose to fix it on a particular colour as it gently lights up your room. It makes the perfect gift for a birthday or a housewarming. Features: LED Mood Lighting – Colour changing spectrum or fix it on a colour of your choice Multipurpose – Can be used as a Humidifier or an Air Purifier Quiet - Whisper quite ultrasonic operation Misting – Lasts up to 2 hours Built-In Safety Features - auto shut-off feature when water tank is empty Water Tank Capacity: 100ml Diffuser measurements: Height 15cm x Diameter 9.5cm PLEASE NOTE: this product comes with a USB cable only, plug needed. Please refer to the guide (included) for operational and care instructions.