404-3428 - Clock LA CROSSE TECHNOLOGY - Free user manual and instructions
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| Product Type | Atomic Digital Clock |
| Brand | La Crosse Technology |
| Model | 404-3428 |
| Dimensions | 8.0 x 5.0 x 1.0 inches (20.3 x 12.7 x 2.5 cm) |
| Weight | 0.5 lbs (225 g) |
| Power Source | 2 AA alkaline batteries (not included) |
| Display Type | LCD with clear digits |
| Time Sync | WWVB atomic time signal (60 kHz) |
| Time Zone | 7 US time zones (selectable) |
| DST Adjustment | Automatic Daylight Saving Time (programmable) |
| Calendar | Displays date (month/day/weekday) |
| Alarm | Single daily alarm with snooze (10 min) |
| Indoor Temperature | Display in °F or °C (range: 32°F to 122°F / 0°C to 50°C) |
| Humidity | Indoor humidity display (range: 1% to 99%) |
| Mounting | Table stand or wall mountable |
| Cleaning | Wipe with a soft, dry cloth. Do not use water or cleaning agents. |
| Safety | Keep away from moisture and extreme temperatures. Use only alkaline batteries. |
| Spare Parts | Replaceable batteries; no other user-serviceable parts. |
| Warranty | 1-year limited warranty |
| Country of Origin | China |
Frequently Asked Questions - 404-3428 LA CROSSE TECHNOLOGY
How do I set the time manually?
Press and hold the SET button for 3 seconds. Use the +/- buttons to adjust the hour, minute, date, etc. Press SET to confirm each setting. The clock will automatically sync with the atomic signal after setting.
Why is my clock not receiving the atomic signal?
Place the clock near a window and away from electronic interference. The atomic signal (WWVB) is strongest at night. Allow up to 24 hours for initial sync. If still no signal, try a manual search by pressing the REC button (if available) or remove and reinsert batteries.
How do I change the batteries?
Open the battery compartment on the back of the clock. Remove old batteries and insert 2 new AA alkaline batteries observing polarity. Press RESET after inserting batteries. Dispose of old batteries properly.
What does the '--' symbol on the temperature display mean?
The '--' indicates the temperature or humidity reading is out of range or the sensor is not working. Ensure the clock is at room temperature and humidity (32°F-122°F / 0°C-50°C and 1%-99% RH). If the problem persists, check batteries.
How do I turn off the alarm?
To silence the alarm, press the SNOOZE button for 10 minutes delay or press ALARM to turn off. To disable the alarm completely, go to alarm settings and press ALARM until the alarm icon disappears.
Can I use rechargeable batteries?
It is recommended to use standard alkaline batteries. Rechargeable batteries may have lower voltage (1.2V) and can cause unstable operation. If using rechargeable, ensure they are fully charged.
How do I switch between Fahrenheit and Celsius?
Press the °F/°C button (if available) on the back or side of the clock. If no dedicated button, check the user guide: on some models, holding the ALARM button while in normal mode toggles the unit.
Why does the display show wrong time occasionally?
The clock automatically syncs daily. If the time is off, ensure DST setting is correct. Go to settings and check if DST is set to 'ON' (if applicable) or 'AUTO'. Also, verify time zone selection. Weak batteries can cause time loss.
How do I reset the clock?
Locate the RESET button (usually a small pinhole) on the back. Use a paperclip to press and hold for 2 seconds. This clears all settings and forces the clock to search for the atomic signal. Re-enter settings after reset.
Does the clock have a backlight?
Yes, this model features an adjustable backlight. Press the SNOOZE/LIGHT button to turn on the backlight for 10 seconds. For continuous backlight, check if there is a sunset/sunrise feature or use night mode if available.
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USER MANUAL 404-3428 LA CROSSE TECHNOLOGY
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Product information
Brand : LA CROSSE TECHNOLOGY
Model : 404-3428
Category : Clock