Product Information: Intelligent Aroma Fragrance Machine Scent Unit Essential Oil Aroma Diffuser For Home Hotel KTV Specification: Item Name:Aroma Fragrance Machine Voltage:DC5V（USB)） Power:2W Capacity:150ML Noise level:<35dba Color:White/Black Atomization way:Two-fluid Atomization Power supply:Electricity/battery Battery:2x D battery(Not included) Usage Area:300m Size:approx.145x60x165mm/6.5x2.37x5.71"" Weight:0.5kg (1cm=10mm=0.39inch) Measurement Details in the attached picture. Feature: 1. bluetooth connection, control APR Settings time and concentration of aroma, 2ABS and PP material.screw-free design, easy installation of hanging wall. 3.Back repair windows for customer maintenance. 4. Away from tedious, removable essential oil, quick and convenient 5.Modern and beautiful appearance. Work more quietly. 6.10 times settings, high-end design, two fluid Atomization technology, installation section 2 battery or USB plug in the two choices. 7.essential oil visible window, easy to master essential oil capacity. Package included: 1x Aroma Fragrance Machine 1x USB Cable Notice: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight deviation for the measurement data. 3.Please allow 1-3cm error