This is my second SMT altimeter. I was asked by many people who do not know how to assemble an altimeter to assemble it for them. The hardware and firmware are very similar to the AltiUno however it uses SMT componants so that the board is small enought to be used in model rocket.
The altimeter does not come as a kit because it uses SMT parts and those would be too hard or impossible to solder with an iron. It is soldered proffessionally in a reflow oven.
The altimeter is smaller and lighter
You can download the altimeter operating instructions here.