The nearer you can put the Redeemer guitar buffer to your pick-ups the better, because any cable between your guitar and the Redeemer can start to suck your tone. That's why if you can install a Redeemer buffer circuit inside your guitar, it's the best way to go. But, sometimes you just can't. Or, maybe you have 6 guitars and don't want to buy 6 Redeemer kits (if you do have 6 guitars ask about quantity discounts).
 
The belt pack is simply a Redeemer guitar buffer in a convenient box to make buffering any guitar or bass easy.  A short 18" low capacitance cable is used for maximum tone preservation.