i have to say this item is real difficult to balance I have seen many guides online I use 2 lenses DJI 15MM and Olympus 40-150MM not difficult at all and can never balance it with my GH4 I just drive it best, can be balanced but not as good as like in the tutorials shown, I didn't have a dipstick, so it might take some time to level it. Also note that this is for really not heavy or big cameras as big cameras hit the gimbal in motion. Bluetooth range is about 2 meters without obstacles, with a phone or controller, you just have to be close. If you use metabones and sigma with gh4 dream enabled it will not stick at all. Not satisfied with this product. I need it and there are some good shots but sometimes it freezes and reboots. I have already performed a software update. The included instructions are good. I had to search online for more instructions.