Help humidify oxygen, a practical and essential accessory for oxygen generator. Easy to install on oxygen generator, convenient to operate and use. Reusable design; if the oxygen generator is not used for a period of time, please pour out the water in the humidification cup and clean it before reuse. Large font minimum and maximum water level marks for easy operation. Made of quality plastic material, safe, eco-friendly, firm, and durable. Features easy sealing and a translucent design, suitable for various oxygen generators. Item Type: Oxygen Generator Humidification Cup Compatible with various oxygen generators including Turtle, Sysmed, Longfei, INVACARE, Kaiya, MED JOY, Ya Ao, Folee, MELING, YANGLIDE, O2box, YJT, YRK, and others. Operation Instructions: 1. Use only pure water or cool boiled water; do not use tap water or hot boiling water. 2. Fill water to the middle of the two-line English letter scale marks on the humidification cup (do not overfill). 3. Replace the water daily or every two days. If no oxygen is detected after water replacement, check if the humidification cup is securely sealed. 4. Clean the holes in the humidification cup tube every two months using a toothpick. 5. If the oxygen generator is not in use for a period of time, empty the water from the humidification cup and clean it before next use. Type: A Color: White Material: PP Package Contents: 1 x Humidification Bottle 1 x Tube (30cm) Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.