via this auction
"This unit was fully refurbished and is better than all others on the market. It comes with its original box. We paid our tech for 4 hours of skilled labor plus parts costs to make this unit better than all others on the market. It actually came to us in perfect working order, but we wanted to do what we could to make it outlast all others, so we did the following preventative stuff: Replaced battery. Replaced power supply capacitors. Replaced all tact switches. Systematically tested multiple times and working perfectly."
