Specification:Material: Silicone+PCS/M size: inner diameter 17*13CM, outer diameter 23*19CML/XL size: inner diameter 19*13CM, outer diameter 23*19CMThere is an entrance to install photography equipment, but photography equipment is not included.Package Included:1*Diving mask1*Storage bag2*Earplugs Features:1.180 full face design: Our snorkel mask provides a 180 panoramic view, making it easier than ever to breathe comfortably through your mouth or nose while snorkeling. You will see more fish and underwater world than ever before! With the detachable camera stand, you can easily connect the camera and capture the movement around you in a way that does not improve the clarity.2. Comfortable to wear: Made of hard PC, the breathing tube mask is anti-fog, non-toxic and tasteless for adults; soft and thick silicone wrap to protect your safety, long-term wearing will not make you headache; free breathing, no need to include the breathing tube In the mouth and keep clenching the chin.3. Simple BTEATH and anti-fog design: Unigear full face snorkel mask allows users to breathe through their mouth or nose while snorkeling, without using a mouthpiece. Using a snorkel allows you to dive deeper. Separate inhalation and exhalation channels can generate airflow away from the main viewing field, helping to eliminate fog and make your snorkeling time longer.4. DRY SNORKEL technology: The ball on the top of the tube will automatically seal the air valve to prevent salt water from entering your mouth and prevent vomiting, spend less time worrying about the water in the mask and have more time snorkeling.