Product Overview
The Casio MWD100H Series is a rugged, feature-rich digital watch designed for men who demand reliability and functionality in their everyday timepiece. Built by Casio—a brand known for pioneering practical innovation—this watch delivers essential tools for active lifestyles, from timing workouts to tracking time across time zones. With a 10-year battery life and 100-meter water resistance, it’s engineered for long-term durability without constant maintenance. Whether you’re hitting the pool, managing your daily schedule, or navigating outdoor adventures, this watch provides dependable performance in a compact, masculine design.
Key Features
- 10 Year Battery – A built-in lithium battery delivers a full decade of uninterrupted use, eliminating the need for frequent replacements and ensuring consistent performance over time.
- 100 Meter Water Resistance – Rated for depths up to 330 feet, this watch is suitable for everyday wear, swimming, and snorkeling, making it ideal for water-based activities and wet conditions.
- 1/100 Second Stopwatch – Precise timing capability with 24-hour range allows for accurate measurement of short intervals, useful for sports, training, or any activity requiring split-second accuracy.
- Countdown Timer – A 24-hour countdown timer with 1-second resolution helps manage time-sensitive tasks, workouts, or reminders with ease.
- LED Light – A powerful LED backlight illuminates the digital display in low-light conditions, ensuring readability at night or in dark environments.
- Multi Function Alarm – Set daily alarms to stay on schedule, with customizable alerts to support routines, meetings, or workout reminders.
- Auto Calendar – Pre-programmed calendar function automatically adjusts for months and leap years, keeping accurate date tracking without manual input.
- Dual Time – Track time in two different zones simultaneously, perfect for travelers, remote workers, or anyone coordinating across regions.
Technical Specifications
- Item Model Number: MWD-100H-9AVCF
- Department: Men’s
- Product Dimensions: 5 x 7 x 5 inches; 3.84 ounces
- Battery: 1 Product-Specific Battery (included)
- Water Resistance: 100 meters (330 feet)
- Stopwatch: 1/100 second precision, 24-hour range
- Countdown Timer: 1-second increments, 24-hour range
- Display: Digital with LED backlight
- Functions: Alarm, Auto Calendar, Dual Time
- Manufacturer: Casio
- ASIN: B08FRPM2JK
- Date First Available: August 12, 2020
Benefits & Use Cases
This watch excels in environments where reliability and utility are essential. Its 100-meter water resistance makes it a strong companion for swimmers, snorkelers, and anyone frequently exposed to water. The long-lasting battery ensures the watch remains operational through years of daily use—ideal for professionals, students, or outdoor enthusiasts who don’t want to worry about maintenance. The stopwatch and countdown timer support fitness tracking, cooking, or timed work intervals, while the dual time function aids travelers or those communicating across time zones. The LED light enhances usability in dim settings, from early morning jogs to late-night emergencies. With its durable construction and practical features, the MWD100H is built to support a wide range of active, on-the-go lifestyles.
Important Notes
Manufacturer’s warranty is available and can be requested directly through Casio customer service. The watch is not suitable for scuba diving or high-impact water sports beyond snorkeling. Always ensure the crown is properly secured before exposure to water. The included battery is designed for long-term use and does not require replacement under normal conditions for up to 10 years. Regular cleaning with fresh water after exposure to saltwater or chlorine is recommended to maintain performance and appearance.



From the manufacturer


Casio Values
“Necessity is not the mother of invention, invention is the mother of necessity.” These are the words of one of Casio’s founders. The people who created Casio were determined to ‘invent necessity’—to create products that met latent needs with groundbreaking capabilities no one had ever seen before. Ever since, Casio has been doing just that, bringing new discovery and delight to people around the world. This is Casio’s way of building an even more prosperous, richly rewarding world.


Key Features


10 Year Battery
Built in 10 year battery, will provide a decade of use without the hassle of changing batteries


100 Meter (330 feet) Water Resistance
Suitable for everyday use and swimming and snorkeling


Stopwatch And Countdown Timer
1/100 Sec Stopwatch (24Hr)
1/1 Sec C. Down Timer (24Hr)


LED Light
Powerful LED backlight