The Canon Speedlite 600EX-RT has one of the highest Guide Numbers with a range of 197 feet.
It has an exclusive coverrage range of 20mm wide to 200mm telephoto of the lens view.
It is also a radio transmitter which means it can transmit a radio signal to one or more receiver flaslhes up to 100 feet, and doesn't need a clear view to the receiver like an Optical Wireless does.
It will find its receiver whereever it happens to be placed.
This was my main reason for purchasing the 600EX-RT.
Bayonet Lens Hood Sun Shade for EW-73D Canon 80D DSLR EF-S 18-135mm f/3.5-5.6 IS
Oct 20, 2020
Works as good if not better than Brand Name!
It works just as well as the brand name lens hoods I have used, and is twenty dollars less expensive!
Premium Tempered Glass Screen Protector Film For Samsung Galaxy Tab A 8.0 T350
Mar 16, 2017
It is really a solid screen protector, but touch control still works perfectly. Looks to last for a long time.