Waveform generator based on 555 timer

I've been playing around with 555 a 556 timers as noise makers and found that^^^ on ebay can anyone tell me what it's intended use is. It appears to claim to make 4 different waveforms though I'm not sure.
Once again sorry for the stupid questions.
Thanks Simon

simon1974:
can anyone tell me what it's intended use is

Well - it's a waveform generator. You could probably use it for a number of things - testing speakers (audio work - mainly sine, triangle, and square), injecting signals into a digital circuit (mainly the square wave) for testing, perhaps to drive a high-voltage transformer or something like that.

Basically, anywhere you need a basic oscillator for testing or experimentation purposes, mainly.

Thanks cr0sh ! crOsh.
I think I'll get a cupple and see what circuit bending fun can be had. Thanks again.
Simon