Green Invisible LED Watch

I've been over in the US for the last week, and so I thought I'd buy a watch over there as a momento of the trip. Today's watch is that one, and u thought it was unusual enough to fit in with the rest.

At first glance, this watch just looks like a green silicone band with a wider section on top of your wrist. Further examination reveals there are no visible buttons around the case, and the back is a bare light grey square.

The secret is that the button is on the front and hidden under the silicone cover. The button is in the middle at the bottom of the case, and if you miss that spot then nothing happens.

Pressing the button lights the 3 1/2digit LED display which shines through the case (unless the light where you are is too bright). The LED display starts with an animation lighting all of the LEDs (as 18:88) before showing the time. Further presses cycle through time, date, and seconds.

There is only 1 button, so setting involves holding down the button until the display flashes. Short presses then change the digit, and a long press moves on to the next one.

The watch label has the model code FAS-SQ-TCH, and calls it the "invisible LED - green". There is also the number 102409, on the label, but I don't know what that signifies.

The original rrp is $49, but you should be able to find it cheaper elsewhere.