Aroma Diffuser 120ml Bluetooth Easy to Operate Anti Slip Aluminum 4.5W Cylindrical Scent Air Machine for Home Hotel Car EU Plug 100‑240V Item Type: Aroma Diffuser Material: Aluminum Weight: Approx. 1366g / 48.2oz Product Size: Approx. 292x112mm / 11.5x4.4in Essential Oil Bottle Capacity: 120ml (deliver without liquid) Power: 4.5W Coverage: 150m³ Operation Mode: APP Remote Control, Touch Control, 2 In 1 Operation Mode Cleaning the machine: Cleaning is required when the following conditions occur 1. You are ready to change to another essential oil; 2. The amount of atomization is getting weaker and weaker. 3. It is recommended that the atomization core be replaced with a new one after 4 to 5 months of use. Cleaning Procedure: 1. Remove the atomization head and twist off the bottle. 2. Fill an essential oil bottle with the appropriate amount of alcohol and apply it to the device for 5 minutes to stop odor mixing. 3. After drying, finish cleaning.