Expedition TW4B10900JT - Watch TIMEX - Free user manual and instructions
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| Product type | Wrist watch |
| Brand | Timex |
| Model | Expedition TW4B10900JT |
| Movement | Quartz (battery), solar, or manual winding depending on version |
| Power supply | Battery (quartz), photovoltaic cell (solar), or manual winding |
| Main functions | Time, date, day display, Easy Set 12h/hourly alarm, INDIGLO night light, perpetual calendar, elapsed time ring, tachymeter, compass |
| Water resistance | Up to 50 meters (estimate for this model) |
| Shock resistance | Compliant with ISO standard |
| Display | Analog with hands and date/day |
| Lighting | INDIGLO® electroluminescent technology |
| Strap | Steel or fabric (depending on version), adjustable by links or sliding buckle |
| Glass | Mineral or acrylic (estimate) |
| Case | Stainless steel or resin (depending on version) |
| Case dimensions | Approximately 40-44 mm in diameter (estimate) |
| Weight | Approximately 50-80 g (estimate) |
| Battery | Specific type indicated on case back; estimated lifespan 1-2 years |
| Care | Rinse with fresh water after contact with seawater; avoid pressing buttons underwater |
| Safety | Do not throw battery into fire; keep out of reach of children |
| Warranty | Lifetime warranty covering free battery replacement (shipping costs extra) |
| Repairability | Battery replacement by a professional recommended; spare parts available from Timex |
| General information | Manufactured by Timex Group USA, Inc.; manual available in multiple languages |
Frequently Asked Questions - Expedition TW4B10900JT TIMEX
How to set the time on my Timex Expedition watch?
Pull the crown fully out (position C). Turn it in either direction until the correct time is displayed. Push the crown back in to restart. For screw-down crown models, unscrew it counterclockwise first.
How to set the date?
Pull the crown to the middle position (B). Turn it clockwise (or counterclockwise depending on model) until the desired date appears. Push the crown back in to confirm. Avoid setting the date between 10 PM and 2 AM to prevent damaging the movement.
How to use the INDIGLO backlight?
Press the push button or crown to activate the electroluminescent backlight that illuminates the entire dial. Release to turn off.
Is my watch waterproof?
Water resistance is indicated on the dial or case back. For this model, it is estimated at 50 meters. Do not use for diving. Avoid pressing buttons or pulling the crown underwater.
How to change the battery?
Timex recommends having the battery replaced by a retailer or jeweler. The battery type is engraved on the case back. After replacement, press the reset button if present.
How to adjust the strap?
For a sliding buckle strap, open the plate, slide the buckle to the desired length, then close until it clicks. For a link bracelet, use a pointed tool to push the pins in the direction of the arrow and remove links. Reassemble in reverse order.
How to use the tachymeter?
Start the chronograph when the second hand is at 12 o'clock. After traveling 1 km or 1 mile, read the speed on the tachymeter scale (e.g., 80 for 45 seconds). Multiply by the distance if it is greater than 1.
How to use the integrated compass?
Place the watch flat, point the hour hand towards the sun. In the morning, turn the bezel until the S (south) is halfway between the hour hand and 12 o'clock. In the afternoon, the S should be before the hour hand.
How to set the Easy Set alarm?
With the alarm crown in position D, turn it to set the desired hour/minute. Pull it to position E for 12-hour alarm (rings twice a day) or F for hourly alarm (rings every hour). A beep confirms activation.
Does the perpetual calendar need adjustment?
No, the perpetual calendar is preset at the factory and adjusts automatically for months and leap years. Just set the time correctly. If the date changes at noon, advance or set the watch back by 12 hours.
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