Blue LED ''Lava''-Style Digital Wristwatch, retail $4.18
Manufactured by (Unknown)
Last updated 03-21-11

I've only reviewed five watches prior to this, so please bear with me here.

You might remember LED wristwatches from the 1970s, heck, you might still have one.

The Blue LED ''Lava''-Style Digital Wristwatch is unusual not because of those bright blue LEDs, but because of the way it displays the time & date. There is no "face" on this wristwatch -- it looks like you're wearing a beefy metal bracelet!

It is (in some capacity) based upon the Japanese Samurai sword.

It can display the time & date like other digital watches, and it has a steel band.


This LED wristwatch comes ready to use right out of the box. You may need to set the hour to the time zone you're in, and set the date as well - but is otherwise ready to go right away.

The wristband has a unique "fold over" clasp that did take me awhile to figure out, but once that occurred, it's so easy a caveman can do it...O WAIT!!! WRONG COMMERCIAL!!!

To read the time, press & release the button on the upper right once. The time will be displayed for three seconds, and then automatically extinguish.

To read the date, press & release the button on the upper right two times. The date will be displayed for three seconds, and then automatically extinguish.

To read the seconds, press & release the button on the upper right two times. The seconds will be displayed for three seconds, and then automatically extinguish.

The furnished instructional materials were a bit vague, so I had to kinda fly by the seat of my pants here for a short time.

To set the watch, press & release the upper right button once so that the time is being displayed. While the time is being shown, press & hold down the lower right button for a second or two, and then release it.

The "hours" digit will begin flashing. Press & release the button on the upper right one or more times to set the hour. AM and PM are differentiated by the fact that PM has a vertical bar to the extreme left lighted.

Press & release the lower right button again to get the "minutes". Press & release the button on the upper right one or more times to set the minutes.

Press & release the lower right button a third time to get the "month" value (from 1 to 12) to flash; press the upper right button one or more times to set the month.

Press & release the lower right button a fourth time to set the day of the month (the two lowermost digits will flash); press the upper right button one or more times to set the day.

Press & release the lower right button a fifth time to set the year; press the upper right button one or more times to set the year.

Press & release the lower right button a sixth time to set the watch for 12-hour (AM and PM) or 24-hour (military time); press the upper right button one or more times to set 12- or 24-hour mode.

Finally, press & release the lower right button a seventh time to return the watch to its normal functionality.

While you're setting the time & date, you are only furnished with five (5) seconds between button presses; if you take longer than this, all of the digits will extinguish themselves and you'll have to start over.

It is not stated how the battery should be changed, so I don't have instructions for performing a battery change.

The watch uses a single CR2016 lithium coin cell.

You may need to reset the time & date when battery changing takes place.

Because this is a watch and not a flashlight, I won't try to flush it down the potty, stomp on it with old or used bowling "shooz", viciously throw it at a wall, a bathtub, or a wall-mounted porcelain uranator to see if it explodes (the watch, not the uranator), smack it against a steel rod, run over it with my Celebrity motorised wheelchair, or perform other potentially destructive tests on it that might be performed on a flashlight.

As a wristwatch, I think it's quite nice. And to see real live LEDs in it, that's even better. I love LEDs and things made with them, and this watch is no exception.

A picture showing the watch displaying the time (9:40am).

Photograph of the watch on my arm -- this is where it ***REALLY*** belongs.

Photograph showing the "PM" indicator -- it's that vertical bar at the upper left of the display.
In this picture, the watch reads 8:35pm.

Spectrographic analysis
Spectrographic analysis of the LEDs in this wristwatch.

Spectrographic analysis
Same as above; spectrometer's response narrowed to a range between 440nm and 540nm to pinpoint peak wavelength; which is ~475.50nm.

USB2000 spectrometer graciously donated by P.L.

A video on YourTube showing the watch displaying the time, date, and seconds -- plus a failed attempt at extending the "seconds" display that worked on the Ohsen Red LED Wristwatch.

This video is approximately 5.4884552340 megabytes (5,630,872 bytes) in length; dial-up users please be aware.
It will take no less than twenty seven minutes to load at 48.0Kbps.

Test unit was purchased on Ebay on 02-15-11, and was received at 4:07pm PST on 02-24-11 (or "24 Feb 2011" or even "24 Feb Twenty Double Sticks" if you prefer).

UPDATE: 00-00-00

Truly unique in the world of portable timepieces

Band size adjustment has not yet been figured out; this watch cannot be used until that occurs (I've since been told that specialised tools or a trip to a watch repair shop may be necessary to perform this adjustment)

    PRODUCT TYPE: LED digital wristwatch
    No. OF LAMPS: At least 56
    SWITCH TYPE: Momentary pushbuttons for viewing & setting time and date
    CASE MATERIAL: Stainless steel body & band
    BEZEL: N/A
    BATTERY: 1x CR2016 lithium coin cells
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER- AND PEE-RESISTANT: Very light splatter- and perspiation-resistance only
    ACCESSORIES: 1x CR2016 cell, metal gift tin
    WARRANTY: Unknown/not stated


    Because this product is not intended to emit
    light, the standard "star" rating will not be used.

Blue LED ''Lava''-Style Digital Wristwatch *

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