it's pretty tiny, it records reasonable 640x480 video in AVI format at 25 frames per second, and it can be set to standby for up to 250 hours until it's activated by a sound, making it a good little spy cam unit. costs less than US$25 on eBay, delivered to your door. still concerned about quality, you might just as well buy five of the things in case four break. Which they're not doing nearly so much these days.
Have a look at this footage:
Go and read the specs if you want to - they're nothing particularly special. It's a simple USB spycam that's about the size of your thumb, In the case of the clip above, that's on a motorcycle helmet,
You can set it up in a room on audio-activated standby mode, where it will happily sit for nearly two weeks on a single battery charge, waiting for a noise to start it recording. It uses microSD, which means you can store up to 16GB of footage on it, and it plugs into your computer via USB (which also charges it) to let you transfer files.
And it's less than 25 bucks.
Link to Product on ebayhttp://shop.ebay.com/?_from=R40&_trksid=p3907.m38.l1313&_nkw=md80&_sacat=See-All-Categories