Lot's of cool weirdness potential crammed into this module from 4ms - basically it's 4 independent LFO's (normally used for changing a parameter in another module over time) with various waveshapes, all with independent Clock inputs (called "Ping"!!) and you can manually Ping the LFO with the front panel buttons too. Where's the weirdness? Well, you can take the output signal of the first LFO and feed it into the Ping input of the second LFO which can feed the Ping input of the third....well, you get the idea. The LFO's can run right up into Audio Rate frequencies (like 500 Hz) for some serious sound mangling techniques.

Here's what 4ms have to say about it:

The Quad Pingable LFO is a compact, playable four-channel tap-tempo, clock-syncable LFO with variable skew and reset.

The QPLFO is designed to be useful in small portable systems that require maximum functionality in minimal space, as well as large systems that need maximum modulation sources.