Review on Foldable Quadcopter Drone for Beginners, Adults, and Kids - 1080p HD Camera, 5G WiFi FPV Real-Time Transmission, Gesture Selfie, Altitude Hold by Lauren Lewis

Rear left propeller broken. When you insert the battery and turn it on, the propeller starts spinning (the others don't spin until takeoff) and doesn't stop until you remove the battery. When you try to take off, it doesn't rotate fast enough to lift off the ground and the device turns off. The device has a short warranty, but I need to find the manufacturer's contact information to use it.