Having used this roller I can honestly state this is probably the very best Vibrating Foam Massage Roller available. This gave me one of the deepest massages that I have ever had. It got rid of the knots in my lower back in just a few short minutes of use. The roller measure 325mm in length and is fully rechargable.
The LED lights on the end of the roller let you know when it needs to be recharged. It also tells the level of power you are using too as this is adjusted by using the power switch until you have reached your desired setting. There are in fact 5 variable speed settings to choose from.
There are some cheap and nasty versions on the market so don't be tempted to buy cheaper inferior products.
If you have ever used a standard foam roller and wanted more from it, then this will do just what you were missing. Whilst rolling out your muscles you also get the vibrations from the roller, which get deeper that just rolling on its own. Proven to reduce muscle tension, whilst also improving mobility and flexibility.
This might possibly be the best money you will spend on a fitness product.