This Mini USB Aromatherapy Diffuser can be used in the car or small to medium-sized rooms. This is recommended to be used with purified water and essential oils to freshen up your space. With a 260ml capacity, this diffuser freshens up 215 to 646sqft range (20 to 50sqm) for up to 6 hours. It doesn't only invigorates air when operated and can also double as a night light. You can recharge this diffuser via USB cable and take it anywhere with you, may it be your room or car. Breathe fresh air everywhere with Mini USB Aromatherapy Diffuser.