Bought to fly my hubsan x4 h507A. The lack of instructions is worth a star deduction, and the dead switches and lack of good labeling should make this a three star rating. BUT physical sticks, even with a slight lag, gave much better control than using it alone. The video and photo buttons haven't worked for me yet, YMMV. If you'd rather fly with a transmitter than with a phone or tablet then I think this is a good buy.