Hey Tim, I bought this product about 3 weeks ago and I can't say enough about how well these operate and they are fully 107.29 compliant. They have 4 Cree LEDs and are extremely bright. This particular model is the newest version and it has 3 modes of flashing. (Strobe, Flash, and Constant). I attach securely with industrial strength, low profile velcro to my drone and with them being so light, they will not separate from the drone in flight. I love this product, no wires and about 4 to 6 hours run-time before needing next charge. I hope this helps.
Drone UAS UAV Quadcopter LED Strobe Light