Listen Up Personal Sound Amplifier, retail $14.99 (
Manufactured by (Unknown) for Listen Up (
Last updated 06-03-10

This product was not designed to be used specically as a flashlight, but because it uses a blue LED as a power indicator, I figured what the hey.

The Listen Up Personal Sound Amplifier is just that: a small sound amplifier that can be used to amplify fainter sounds, such as from a TV set so you don't awaken your mate, animal sounds, children in a playground, etc.


First thing you'll want to do is install the included AAA cell in it.

Plug the earphones in, check to be sure the volume control is turned all the way down or the unit is turned off, and place the earphones in your ears. The earphones come with foam covers, but I have yet to figure out how to attach them without ripping or tearing them.
(Edit 03-27-07): These covers stretch over to fit each individual earphone; they will not rip as had earlier been suspected.

Turn the unit on by turning the wheel on the right side of the unit downward until it clicks, and continue rotating it until the sound volume is at a comfortable level. When it is turned on, a blue LED on the front of the unit will come on.

Clip the unit onto the outside of a shirt or pants pocket.
Do not place it inside of a purse or pocket; the sound pickup on the unit will be seriously impaired if you do.

When finished using it, turn the wheel on the side of the unit upward until it clicks and the blue light on the front of the unit turns off.

To change the battery, get a butterknife from the silverware drawer, look at the bottom of the product for two short horizontal lines and an arrow on one of the silvery side panels. Pry it off, throw it in the garbage can (dustbin), and take the bag to the outside wheeled garbage can (wheelie bin) so the garbage man (dust man) will haul it away next week...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Remove the used AAA cell, and dispose of or recycle it as you see fit.

Insert a new AAA cell, orienting it so the flat end (-) negative of the cell faces the spring for it in the compartment.

Snap the battery door back on, and be done with it.
Aren't you glad you didn't dispose of that battery door now?

Unable to measure current usage due to how the product was constructed.

This product is meant to be used as a sound amplifier, not as a flashlight meant to be carried around, thrashed, trashed, and abused; so I won't pee on it, try to flush it down the toilet, bash it against a steel rod or against the concrete floor of an outdoor patio, let my housemate's kitty cats bury it in the litterbox or poop on it, run over it with a 450lb Celebrity, or perform other indecencies that a regular flashlight might have to go through.
So this section of the web page will be significantally more bare than this section of the web page on a page about a flashlight.

Photograph of the blue LED power-on light - illuminated of course.

Spectrographic analysis
Spectrographic analysis of the blue LED in the Listen Up.

Spectrographic analysis
Same as above; newer spectrometer software setting used.
USB2000 spectrometer graciously donated by P.L.

WAV audio (sound) file (.wav extension) created so you could hear the sound.
This clip is approximately 0.2 megabytes (222,787 bytes) in length.

The music from the computer game Wolfenstein 3D was playing, and
one of the earphones was placed directly over my camera's microphone.

Test unit was purchased on the Listen Up website in early-March 2007 after seeing TV ads for it, and was received on the afternoon of 03-26-07.

Product was made in China. A product's country of origin really does matter to some people, which is why I published it on this web page.

UPDATE: 04-02-07
The {vulgar term for having intercourse} earphones are somewhat uncomfortable to use and don't stay in your ears; as a result, additional testing of this product will be somewhat limited to say the least.

UPDATE: 04-04-07
I tried it again to listen to the TV while at the computer. This product amplifies ***EVERYTHING*** - breathing, mouse clicks, typing, etc., so I deactivated the unit, closed my door, and turned the TV up a little.

UPDATE: 05-06-07
I tried listening to see if I could hear my watch ticking, and surprise...NOT!!! I could.

Does what it was intended for adequately - but see below

Earphones are uncomfortable to use & don't stay in
Even ***LIGHT*** handling when unit is switched on causes loud scraping sound in earphones
Amplifies ALL sounds, not just the target sound

    PRODUCT TYPE: Personal sound amplifier
    No. OF LAMPS: 1
    SWITCH TYPE: Rotary pot on/volume adjust/off
    CASE MATERIAL: Plastic
    BEZEL: N/A
    BATTERY: 1xAAA cell
    CURRENT CONSUMPTION: Unknown/unable to measure
    ACCESSORIES: 1 AAA cell, earphones, foam for earphones
    WARRANTY: 60 days


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

Listen Up Personal Sound Amplifier *

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