Answer- Question:Has anyone used a LAUNCH X431 Diagun as i am thinking of investing in one it seems to have all functions of x431 but cheaper faster and smaller. Answer:Yes,launch x431 diagun has all functions,the same as launch x431 master. But launch x431 diagun is smaller,cheaper,faster than launch x431 master. PS: Launch x431 diagun has bluetooth. It is a good choice and hotsale now. Q: What is the special point of X431 Diagun? A: The main unit of X431 Diagun is like a small PDA.Touch screen,It is multip-language. Q: How to update this product? A: X431 Diagun now is update via Email.