Features: 1. The soft and comfortable silicone resin can stay firmly in the nostrils and form a perfect seal without straps. 2. High quality material: The product is made of high quality silicone, it doesn't contain heavy metal, harmful substances and is safe to use. 3. Compact and portable: being so mini and light-weight, this product does not take much space and can be easily taken away. Description: Ensure that the human body breathes normally, so that the breathing reaches the healthy standard. Specifications: Material: ABS Color: pink, blue, white, red (optional) Size : 58*30*17 Package Included: 1 * Stopper (Without battery) Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.