Casio STR300 Series | Classic Dive Style | 50M WR | 1/100
Product Overview
The Casio STR300 Series combines a classic dive-inspired aesthetic with practical functionality, making it a dependable choice for women seeking a durable, everyday watch. Its compact design and lightweight build ensure comfort during extended wear, while the 50-meter water resistance allows for confident use during swimming, showering, and other surface-level water activities. This timepiece is engineered not just for style, but for real-world utility—offering a suite of timekeeping tools that support active lifestyles, travel, and daily organization. From tracking workout intervals to managing multiple time zones, the STR300 delivers consistent performance without relying on digital connectivity. Backed by Casio’s reputation for reliability, this watch is built to last, featuring an auto calendar that remains accurate through 2099 and a battery that can power the watch for up to a decade with normal use.
Key Features
- 50M Water Resistance: Rated for immersion up to 50 meters (5 ATM), this watch is suitable for swimming, rain exposure, and casual water contact. It is not designed for scuba diving, high-impact water sports, or prolonged submersion beyond surface activities.
- 1/100 Second Stopwatch with 60-Lap Memory: Achieve precise time measurement down to hundredths of a second, ideal for timing athletic performances or training drills. The integrated memory stores up to 60 lap times, allowing users to review splits and monitor progress over multiple sessions.
- Countdown Timer: Set custom countdowns for workouts, cooking, study sessions, or presentations. The audible alert at the end of the countdown ensures timely transitions without the need for constant checking.
- Multi-Alarm Function: Configure multiple daily alarms to stay on schedule with reminders for medication, meetings, or personal routines. Each alarm is independently adjustable for time and frequency.
- Dual Time Display: Monitor a second time zone simultaneously—perfect for travelers, remote workers, or anyone coordinating across different regions. This feature eliminates the need to manually calculate time differences.
- LED Light: An electroluminescent backlight provides clear visibility in dark environments, such as early morning runs, nighttime travel, or power outages. The light activates with a simple button press for quick illumination.
- Auto Calendar: Pre-programmed to automatically adjust for varying month lengths and leap years through the year 2099, reducing the need for manual date corrections.
- 10-Year Battery Life: Powered by a single lithium metal battery, the watch is designed for long-term use with minimal maintenance. The extended battery life makes it ideal for those who prefer a “set and forget” timepiece.
Technical Specifications
- Model Number: STR300-7
- Department: Women’s
- Item Dimensions: 6 x 6 x 4 inches
- Item Weight: 0.96 ounces
- Battery: 1 Lithium Metal battery required
- Water Resistance: 50 meters (5 ATM)
- Stopwatch: 1/100 second precision with 60-lap memory
- Alarms: Multi-alarm function
- Time Features: Dual time, countdown timer, auto calendar
- Display: LED light for backlighting
- Battery Life: Up to 10 years
- Manufacturer: Casio
- ASIN: B004IZ2LB4
- Date First Available: March 30, 2011
- Manufacturer’s Warranty: Available upon request from customer service
Benefits & Use Cases
The Casio STR300 is ideal for women who value functionality, durability, and simplicity in a timepiece. Its water-resistant design makes it a reliable companion for swimming, beach outings, or rainy days. Fitness enthusiasts will find the stopwatch and lap memory particularly valuable for tracking performance during runs, laps, or interval training. The countdown timer supports structured routines, whether timing a workout circuit, brewing coffee, or managing presentation segments. For travelers, the dual time feature offers seamless coordination across time zones, helping maintain schedules without confusion. The LED backlight ensures readability in low-light conditions, such as early morning commutes or nighttime emergencies. With its decade-long battery life, the watch reduces the hassle of frequent replacements, making it a practical choice for long-term use. Its lightweight construction and compact size also contribute to all-day comfort, whether worn during workouts or casual outings.
Important Notes
This model has been discontinued by the manufacturer and may only be available through select retailers. While it remains functional and reliable, availability could be limited. The product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm—users are advised to review safety information before handling. A single lithium metal battery is included and pre-installed. Customers may request a manufacturer’s warranty directly from Casio’s customer service team. It is recommended to confirm compatibility with intended use, especially regarding water exposure beyond surface-level activities.
