Now producing in limited quantities.... For those that wish to purchase a set, instead of building your own, we have here a dedicated bluetooth remote and handlebar button set compatible with the full version of the RallyBlitz Nav Pro app for the iPad mini (thread here) that allows for Odometer adjustment and roadbook advance/reverse as well. The base app is free (done by another inmate here) but to use the Bluetooth remotes and other enhanced functions you have to buy the full app. I know the buttons work with other apps that use volume +/- and next/previous track inputs, even on android devices. The button housings are from Highway Dirt Bikes. I have run a set for the last 3 years for thousands of miles with no issues, soldered and wired just like these are. The buttons themselves are metal housings and waterproof/dustproof. The backs of the switches and wires are sealed with potting silicone (non-corrosive). They may not be the prettiest but it works well. The odometer adjustments are in the standard +/- 0.1 increments. All the buttons will work with a continuous push and will scroll continuously or change the odometer until released. The bluetooth boards are the Adafruit Feather 32u4, programmed with the latest RallyBlitz keyboard emulator programming. The boards are powered by the USB cable and have backup power from a small lithium battery in the case. When plugged into a USB port the switches are automatically powered on. The rocker switch on the case allows for the internal battery to power the device and battery charging if connected to a USB connection. There is battery charging/discharging safety built into the board but as with any battery these days be mindful to turn the device off and make sure all the lights are off on when done. I would strongly recommend the BlueSeas USB ports wired with a 5amp fuse to the battery to supply power to the iPad mini and the button set. The translucent case allows you to see the status of the board via its 3 lights. When you power it on there is a red flashing light. Once paired there is a solid blue light and when charging the onboard battery there is a yellow light at the other end of the board. To pair with your iDevice: 1) Turn on bluetooth on device. 2) Power on button set. 3) Select 'RallyBlitz Control' from available connections (Android may see 'Adafruit device' or similar) 4) Accept 'Pair' in popup. No need to click any pair buttons on the device or to open the enclosure! The board enclosure and rocker switch are NOT waterproof and should be placed somewhere they won't get drenched. The cost for one button set is $140 plus shipping. I will accept paypal (even credit cards) and checks once they clear. Shipping charges will just be whatever USPS charges, nothing beyond that. Please PM me here with your address if you are interested in a set and I will get you a total cost with shipping. (For those lurking and not members you can email me at seearebe 'at' netscape.net.) Let me know if you have any questions. I will try and be timely in responses but I do have a day job and am not always in front of a computer. The black cable would be ziptied safely to the bars, this was just a quick mockup to show the buttons on the bars of a bike. The bottom two buttons can rotate a bit, side to side, to personalize the fit as you wish, just an allen bolt accessible on the back. Here is a quick video showing how the buttons work with the Rally Blitz Pro app.