Looks like a USB drive. Solid plastic around the loop for hooking onto your keys. Can be used as a microSD adapter by it's nature. Doubles as a sound card when plugged in (although the left and right channels are flipped)! I'm not kidding! I think maybe this device is meant to be something more a...
Looks like a USB drive. Solid plastic around the loop for hooking onto your keys. Can be used as a microSD adapter by it's nature. Doubles as a sound card when plugged in (although the left and right channels are flipped)! I'm not kidding! I think maybe this device is meant to be something more than just a clandestine MP3 player. I cracked it open but the microcontroller seems custom (of course there's no info after checking out the laser-etched part number). Sound quality is pretty bad without some modification. I soldered in the smallest 100k trim-pot I had on hand to lower the maximum volume to my liking and get rid of the hissing and emphasis on treble. As an alternative, if you have a headphone extender with a volume knob, that'll do something similar. You can just turn the device itself all the way up and control the volume from the extension. Either way, it sounds normal after you do that. LEDs are way too bright. USB connector could be a "real" one. The headphones are useless. The microSD card slot is impossible for an adult's fingers to get at without a small flat screwdriver. The color in the pictures is slightly different. I got a somewhat lighter blue one. Acetone got rid of the annoying looking logo, but it also got rid of some of the rubber feel coating on the plastic. :-( Also, because it's not explained, I'll tell you how the buttons work: Play/Pause: - Press and Hold: Switches between FM radio and MP3 player. - Nomal Press: Play/Pause. Negative button: - Press and Hold: Volume down. - Nomal Press: Previous track/station. Positive button: - Press and Hold: Volume up. - Nomal Press: Next track/station. Finally, the manufacture date on the PCB said: "2012-12-24" so it's from the future! ;-) An interesting little gadget. It would be a cool little thing to just have on your keys if it was slightly better built. I would easily pay 5-10 bucks more if it had a metal USB connector, the sound quality was better, the sound card function was advertised (and the channels flipped to normal), and it came in black or something.
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