Power requirement: 4x AAA alkaline batteries (not included). Uses a common, readily available power source for easy replacement. Waterproof design: level4 (waterproof). Enables use in wet environments and light immersion within its rated capability. Display: 2 inch TN/ANTIUV LCD. Provides a compact viewing panel with an antiUV treated LCD for durable visibility. Depth capability: 328 feet (100 m). Suitable for underwater use to the specified depth. Use scenarios Recreational diving and snorkeling: The depth capability supports underwater use up to 100 m, making it suitable for exploration and measurement in appropriate conditions. Outdoor water activities: Ideal for boating, fishing, and kayaking where exposure to water is possible, thanks to the waterproof design. Fieldwork and marine tasks: Useful for research, inspection, or work near or under water where reliable operation in wet environments is required.