Review on HGLRC Zeus F722 Flight Controller with Barometer and Black Box for DJI Racing Drones, Quadcopters and Multirotors by James Grindberg

The board was in use when I took it out of the box with parts already soldered. I've had it over 30 days when I took it out of the box for the assembly I bought it for. Was very disappointed when I saw it being used. Nowhere does it say it was used before I bought it. The red light on the FC stays on, so I tried downloading the latest firmware, it won't boot. The board itself may be good, but not from this seller. It's been 30 days so I'm stuck with that and learning. I will inspect all my items as soon as I receive them.