Ok, I've had this stimulator since Sept. of 2015, so I have quite a bit of experience with the unit. First off it was 2015. Wireless control was around but I trusted my doctor when he said this was the best around. Big mistake. I was unaware of the HUDGE finical incentives available to doctors that install Medtronics devices. Fast forward to now almost three years later. My battery does weird things like go from a state of low charge to a state of medium high charge. Then it will crater within a few hours. It will completely discharge and give a warning requiring a recharge. I recharge and it will only take 2hours to top off but then the battery will discharge completely a few hours and then go back to 3/4 full. Sometimes it takes weeks to discharge other times it only takes a few days. It does not releave all of the pain. At best it releaves 75%. I have 3 programs that I have to shuffle between in order to achieve some relief. This is a major drawback to the Medtronic devicies. They are NOT WIRELESS! Having to hold the antenna over the battery pack while also holding the controller means you have to stop and remove any coat or jacket, stand still or sit and navigate through the menu in order to make the necessary adjustments to every lead and for the amplitude. I could go on and on about the short comings of these devices but the bottom line is they need to come into the the 21 Century. Having said that their placement of the device should be limited to the cranium as was the case starting in the 1950's. Studies show superior control without the danger of leases moving and failing. If you are reading this then seek out alternative wireless manufactures and steer clear of Medtronics.