Specification: Item Type: Bluetooth Essential Oil Diffuser Size: Approx. 16 x 14.8 x 6cm/6.3 x 5.8 x 2.4in (L x W x H) Weight: Approx.532g/18.8oz Mounting Hole Diameter: Approx. 9cm/3.5in Power Supply: Battery, USB (Choose one of the power supply methods) Battery (Shipped Without Battery) : D Battery x 2 1.5V USB Power Supply (Shipped Without USB Cable) : 5V Coverage: 90m³ Function: Aroma Usage: Hang Up  Capacity (Shipped Without Liquid) : 100ml Operation Mode: Bluetooth, Button Setting Occasions: Suitable for hotel, family, physiotherapy, hot spring Resort, sauna, SPA, KTV, leisure club Package List: 1 x Essential Oil Diffuser 1 x Key 1 x Accessory 1 x Double Faced Tape 3 x Expansion Tube 4 x Screw 3 x Nail 1 x Cap 1 x Manual Features 100ML Capacity: The essential oil diffuser has a capacity of 100ml that provides long lasting of consistent soothing mist and spreads the aroma in your room effectively, having quiet operation. Smart Bluetooth Control: The diffuser comes with Bluetooth technology, can be controlled by button, multifunctional supply operation, simple and convenient. Hang Up Design: With its innovative hang up design, you can put this aroma diffuser anywhere you want like bedroom, office, or yoga room, space saving. Sturdy Material: The shell is made of premium PP material, which is optimized by thickening and strengthening for more durability, ensuring long term use. Adjustable Gears: With 10 atomizing gears and 90 to 900 seconds stop atomizing time, you can meet your fragrance requirements for diffuser space.