Tbest B640Wc Digital Watch User Manual

1. Product Overview

The Tbest B640Wc is a versatile digital wristwatch featuring a durable stainless steel construction and a range of practical functions. This manual provides instructions for its proper use and maintenance.

Key Features:

• Material: Stainless steel bracelet, buckle, and back case; plated zinc alloy case; high-hardness glass.
• Display: Digital with EL backlight for night visibility.
• Functions: 12/24-hour display, date, day of the week, alarm, chronograph.
• Movement: Electronic with IC chipset for precise timekeeping.
• Water Resistance: 30 meters (suitable for daily use like hand washing, splashes).
• Power Source: Integrated CR2016 button cell battery (75mAh).

Image 1.1: The Tbest B640Wc Digital Watch, showcasing its design and display on a wrist.

2. Initial Setup

2.1 Button Functions:

The watch typically features four buttons for operation, usually located on the sides of the watch case. While specific labels may vary, their general functions are:

• LIGHT: Activates the EL backlight.
• MODE: Cycles through different display modes (Time, Alarm, Chronograph).
• RESET/ADJUST: Used to reset values or enter/exit setting modes.
• START/SET: Used to start/stop functions or adjust values during setting.

Image 2.1: A close-up view of the watch face, highlighting the buttons and their labels for user interaction.

2.2 Time and Date Setting:

1. From the normal time display, press the MODE button repeatedly until the time setting mode is indicated (e.g., seconds flashing).
2. Press the RESET/ADJUST button to select the value you wish to change (seconds, hours, minutes, year, month, day).
3. Use the START/SET button to increase the selected value. Hold to rapidly advance.
4. Once all settings are correct, press the MODE button to exit the setting mode and return to the normal time display.

2.3 Strap Adjustment:

The stainless steel strap is adjustable to fit various wrist sizes. To adjust:

1. Locate the clasp on the strap. There is usually a small lever or arrow indicating where to lift.
2. Using a small, flat tool (like a jeweler's screwdriver), gently pry up the locking mechanism on the clasp.
3. Slide the clasp along the strap to the desired position. Ensure it is centered on your wrist for comfort.
4. Press the locking mechanism back down firmly until it clicks into place. Test the strap for security before wearing.

Image 2.2: A full view of the watch strap, illustrating its adjustable design.

3. Operating Instructions

3.1 Time Display Modes:

The watch supports both 12-hour and 24-hour time formats. During time setting, you can toggle between these formats using the START/SET button when the hour is selected, or by a dedicated button press depending on the model. The 12-hour format will display 'AM' or 'PM'.

3.2 Alarm Function:

1. Press the MODE button until the alarm time is displayed.
2. Press RESET/ADJUST to select the hour or minute to set.
3. Use START/SET to adjust the alarm time.
4. Press MODE to exit. To activate/deactivate the alarm, typically press START/SET while in alarm mode. An alarm icon will appear when active.

3.3 Chronograph (Stopwatch) Function:

1. Press the MODE button until the chronograph display appears (usually showing '00:00:00').
2. Press START/SET to start the stopwatch.
3. Press START/SET again to pause/resume.
4. Press RESET/ADJUST to reset the stopwatch to zero.
5. Press MODE to exit the chronograph mode.

3.4 EL Backlight:

To illuminate the display in low-light conditions, press the LIGHT button. The EL backlight will activate for a few seconds, providing clear visibility of the time and other information.

Image 3.1: A side-by-side comparison showing the watch display in normal conditions and with the EL backlight activated for improved visibility.

4. Care and Maintenance

4.1 Cleaning:

To maintain the appearance of your watch, wipe it regularly with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, followed by immediate drying. Avoid harsh chemicals or abrasive materials.

4.2 Water Resistance Guidelines:

The watch is rated for 30 meters (3 ATM) water resistance. This means it is suitable for daily use and can withstand splashes, rain, and brief immersion in shallow water, such as during hand washing or face washing. It is not suitable for swimming, bathing, diving, or any activities involving hot water or prolonged immersion. Do not operate buttons while the watch is wet or submerged.

4.3 Battery Replacement:

The watch uses an integrated CR2016 button cell battery. When the display becomes dim or functions become erratic, the battery may need replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure proper sealing and water resistance.

5. Troubleshooting

6. Technical Specifications

7. Warranty and Support

For warranty information and customer support, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for any warranty claims.