NONE

This is a good camera. A friend and I both have these, and neither have had any issues. They have a good contrast and make seeing wires and tree limbs fairly easy. The switchable PAL - NTSC feature has been helpful overall and I'm glad it's there. The lens has gotten fairly scratched up, but I am unable to see any noticeable difference in the video feed. The reason they don't get 5 stars is due to the camera not having any viable mounting options. Printing a mount is always an option but it'd be nice to have something come in the box. Both my friend and I have them hot glued into our airships. It works well, but I've had to reattach it several times after some crashes. If a mounting bracket was included this product would get 5 stars from me. In conclusion, if you want a CCD style camera that works well on the cheap, and you don't mind carrying a hot glue gun around in your flight bag, pick this up. I'm happy with the product, and I think you will be too.

image quality was terrible, there were weird diagonal lines going across the screen even when tested with just the transmitter and no drone, ordered a different camera that looks like a runcam clone, plugged it in and got a perfect image immediately. sent this one back to amazon for a full refund. hopefully the one i got was a dud and others have better luck

Clear video. Great price. If it had a camera mount I would have given it 5 star.

Very good camera, the PAL/NTSC is a plus..

For such a tiny camera, it is amazing! It fits get in my quad and the picture is stunning for such a small camera at an unbeatable price