A description from the Manufacturer:

Our new Logarhythm 4 has been designed to give maximum output in a neat and compact unit.. We have retained the low radius (curve) of the Mk3 model but repositioned the chamber so that the capsule is nearer to the players foot and angled up towards the point of impact.
Because the acoustic chamber is now further forward we have cut away the extraneous material to make your Log lighter and also take up less room in your kit bag.

The width of the Logarhythm 4 is identical to that of the Mk3 so you can play it using both feet or alternatively tap your foot on the right or left hand side depending whether you want a louder or softer tone.
NB: Our stompers arent digital sample players. They are truly responsive analog instruments. We are now offering this unit with an included Log 4 Gig Bag worth 14.95. This is a limited time offer so get yours now!

Acoustic Magazine says:Sound Quality 5 stars,Build Quality 5 stars, Value for Money 5 stars

* Hand-made in the UK from high-quality certificated timber.
* Features a brand new fluted rubber base

* Requires no batteries.
* All UK orders are dispatched postage free.
* Now guaranteed for 3 years.

Dimensions:
195 X 100 X 45 mm

Weight: 560 grams
(may vary a little)

Freq. range:60hz-12khz.Sensitivity:-76db+/- 3db Impedance:600 ohms +/- 30%