1. Úvod
This manual provides essential information and instructions for the proper use and maintenance of your Casio G-Shock GMDB300-1 Step Tracker Digital Watch. Please read this manual thoroughly before using the watch to ensure optimal performance and longevity.
The Casio G-Shock GMDB300-1 is designed as a robust sports-oriented timepiece, featuring a step tracker and smartphone connectivity to support an active lifestyle. Its key resin components, including the case, bezel, and band, are crafted from bio-based resin, reflecting a commitment to environmental responsibility.

Image 1: The Casio G-Shock GMDB300-1 Step Tracker Digital Watch in black with light blue accents.
2. Nastavení
2.1 Počáteční zapnutí a nastavení času
Upon first use or after a battery change, the watch may require initial setup. Follow these steps:
- Ensure the watch is exposed to light to charge the solar battery.
- Stiskněte a podržte UPRAVIT (vlevo nahoře), dokud nezačne blikat kód města.
- Použijte MODE (bottom left) and START (bottom right) buttons to select your home city code.
- Stiskněte UPRAVIT again to confirm and exit the setting mode. The time will automatically adjust based on the selected city.
2.2 Smartphone Link Setup
The GMDB300-1 can be linked with a smartphone for enhanced functionality and data management.
- Download the official Casio G-SHOCK Connected app from your smartphone's app store.
- Povolte na svém smartphonu Bluetooth.
- Na hodinkách stiskněte a podržte tlačítko PŘIPOJIT button (middle left) until the Bluetooth icon appears and flashes.
- Otevřete aplikaci G-SHOCK Connected a podle pokynů na obrazovce spárujte hodinky.
- Once paired, the watch time will synchronize with your smartphone, and tracked data can be managed within the app.
3. Návod k obsluze
3.1 Navigace v režimech
Stiskněte tlačítko MODE button (bottom left) to cycle through the different watch modes:
- Režim měření času: Zobrazuje aktuální čas, datum a den v týdnu.
- Step Tracker Mode: Shows daily step count and progress towards goals.
- Režim stopek: Pro měření uplynulého času.
- Režim časovače: Funkce odpočítávacího časovače.
- Režim alarmu: Set and manage daily alarms.
- Režim světového času: View časy v různých časových pásmech.
3.2 Step Tracker Function
The built-in accelerometer automatically counts your steps. The watch displays your total daily steps and progress towards a set goal. Detailed activity logs can be viewed via the G-SHOCK Connected app.
- In Step Tracker Mode, press START (bottom right) to view daily step data.
- Použijte MODE a START buttons to navigate through different step data views (e.g., daily, weekly, monthly).
3.3 Backlight (Illuminator)
Stiskněte tlačítko SVĚTLO button (bottom center) to illuminate the display for easy reading in low-light conditions. The illumination duration can be configured in the watch settings or via the smartphone app.

Obrázek 2: Podrobný view of the Casio G-Shock GMDB300-1 watch face, highlighting its digital display and various indicators.
4. Klíčové vlastnosti
- Bio-based Resin Construction: The watch incorporates bio-based resin in its case, bezel, and band, contributing to reduced environmental impact. This material maintains the renowned G-SHOCK durability and shock resistance.
- Odkaz na chytrý telefon: Seamlessly connect your watch to the G-SHOCK Connected app on your smartphone via Bluetooth. This allows for automatic time adjustment, easy watch setting configuration, and management of life log data, including step counts and calorie burn.
- Sledovač kroků: An integrated 3-axis accelerometer accurately counts your steps throughout the day. Set daily step goals and monitor your progress directly on the watch display or through the connected app.
- Vodotěsnost 200 metrů: Designed for robust use, the watch is water-resistant up to 200 meters, making it suitable for swimming, snorkeling, and other water activities.
- Odolnost proti otřesům: True to its G-SHOCK heritage, the GMDB300-1 features a shock-resistant structure that protects against impacts and vibrations, ensuring reliability in demanding environments.

Image 3: The Casio G-Shock GMDB300-1 watch worn by an individual, showcasinjeho design a provedení.
5. Údržba
5.1 Čištění hodinek
Pro zachování vzhledu a funkčnosti hodinek:
- Otřete hodinky měkkým, suchým hadříkem, abyste odstranili nečistoty a vlhkost.
- Na odolné nečistoty použijte měkký hadřík dampened with water and a mild neutral detergent. Avoid harsh chemicals or solvents.
- Po kontaktu se slanou vodou hodinky důkladně opláchněte čistou vodou a zcela osušte.
5.2 Bezpečnostní opatření týkající se voděodolnosti
While water-resistant, observe the following:
- Do not operate watch buttons while submerged in water.
- Nevystavujte hodinky horké vodě nebo páře, mohlo by dojít k poškození těsnění.
- If the watch is exposed to extreme temperature changes, condensation may appear inside the crystal. This should clear up quickly. If it persists, consult an authorized service center.
5.3 Battery Charging (Solar Powered)
This watch is equipped with a solar charging system. Ensure regular exposure to light to keep the battery charged. Avoid prolonged storage in dark places.
- Umístěte hodinky tam, kde je jejich ciferník vystaven jasnému světlu.
- The charging time varies depending on the light intensity.
- Refer to the battery level indicator on the display to monitor charge status.
6. Řešení problémů
6.1 Time is Incorrect
- Check Home City Setting: Ensure your home city is correctly set. Incorrect city settings can lead to incorrect time display.
- Odkaz na chytrý telefon: Verify that the watch is successfully paired and connected to the G-SHOCK Connected app for automatic time synchronization.
- Ruční nastavení: If automatic adjustment fails, manually set the time and date as described in the
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