Certified refurbished Wilson Pro commercial cell phone signal booster kits have one year manufacturer's warranty and 60 days money back total satisfaction guarantee from the date of purchase. These high power commercial cellular amplifier kits perform per manufacturer's specifications, and save you money. How and why do they save you money? They have been opened or used and then returned to manufacturer. However, they have been factory tested and refurbished by manufacturer for sale again in like-new condition at a reasonably lower cost. A certified Wilson Pro installer available to install these commercial grade kits professionally, at an additional cost.