breathe essential oil diffuser | 550ml diffusers for essential oils with cleaning kit & measuring cup (natural oak) breathe essential technical specifications: voltage: 100-240v 50/60hz power: ultrasonic frequency: 2.4mhz material: bpa free medical grade, abs+pp+pc capacity: 550ml time: >12h (high mist), >18h(low mist) high mist output: 50ml/h low mist output: 30 ml/h noise level: size: 6.5 x 6.5 x 7 inches what’s in the box: 1 x aroma diffuser (model:be550-o) 1 x power adapter 1 x cleaning brush 1 x measuring cup 1 x user guide