Specification: Item Type: Smart Essential Oil Diffuser Material: PP Size: Approx. 148 x 58 x 158mm / 5.8 x 2.3 x 6.2in Wall Hanging Hole Distance: 90mm / 3.5in Power Supply: Battery, USB, choose one of the power supply methods Battery:1 x D battery 1.5V(Not Include) USB Power Supply: 5V(Without Cable) Coverage: 90m³ Function: Aroma Usage: Wall mounted, desktop Capacity: 100ml(Without Liquid) Operation Mode: Bluetooth mode Places: Hotel, family, hot spring Resort, sauna, SPA, KTV, leisure club Problems and Solutions: No atomization: 1. Check whether the power switch indicates that it is flipped correctly 2. Check if the machine stops atomizing during "non working periods" 3. The gas pump is damaged, replace the new gas pump (this step requires disassembling the machine) 4. Check whether the gas pipe of the machine or atomizer head is loose and falling off Package List:1 x Manual 1 x Aromatherapy Machine 3 x Expansion Tube 4 x Screw 3 x Nail1 x Double Sided Sticker 1 x Key 1 x Wall Hanging Adhesive 1 x Lid  Features Adjust Gear --- Aromatherapy diffuser with 10 gears, 1.5‑15 seconds atomizing interval time, meet your fragrance requirements for room space. Multifunction --- Smart essential oil diffuser adopted nano atomization, smart Bluetooth control, and essential oil fragrance, which is easy to use. Freely Install --- Aroma diffuser humidifier can be placed on the desktop or hung on the wall to save space, which is suitable for multiple scenes. Comfortable Place --- Essential oil diffuser provide long endurance and low noise, which can create an aromatherapy environment for living. Excellent PP --- Aromatherapy diffuser shell made of PP material, thickening and strengthening for more durability, with safety lock for convenient use.