Review on HiLetgo Bluetooth Wireless Compatible Arduino by Andrew Spainhour

UPDATE: I've ordered several pairs of these and they don't accidentally come loose. All of them. Thought I might have gotten a bad pair so I ordered another, same one. As stated in my original review I've been using them for years and never had any problems and then suddenly I had 8 of them that were bad. I've been using them for electronics projects for a number of years and they work great and as expected. To program them you need to use a voltage divider circuit (google it online). The range is large. I order these all the time!