Essential Oil Diffuser 250ml Aromatherapy Diffuser Wall Mount Ceiling APP Control Up to 656 Sq Ft Mist Diffuser 100‑240V for Hotel US Plug Item Type: Essential oil diffuser Material: Plastic Weight: Approx. 1277g / 45oz Product Size: 150x200mm / 5.9x7.9in Coverage: 60m³/180m³ Function: Aroma diffuser Install: Wall mount Control: BT connection Capacity: 250ml(essential oil not included) Application: Hotel, family, hot spring resort, sauna, SPA, KTV, leisure clubs Trouble and Solutions: No Atomization: 1. Check if the batteries are securely in place and adequately charged, and ensure correct installation. 2. Verify if the machine is set to "non working period" mode, which may pause atomization. 3. Inspect if the air pump is damaged. 4. Check if the sealing ring on the air outlet pipe is broken or detached. Weak Atomization: 1. Clean or replace the atomizer core if it is clogged. 2. Replace the sealing washer on the atomizer head if it is missing or damaged. 3. Reconnect the air pipe if it has come loose from the atomizer head. Oil Leakage: 1. Ensure the bottle is tightly secured and properly installed. 2. Replace the damaged or missing sealing gasket inside the atomizer head. Liquid Spraying: 1. Replace the damaged atomizer head. 2. Place the machine upright or flat to prevent improper spraying. Abnormal Noise: 1. Secure the loose air pump firmly in place. 2. Replace the damaged air pump.