Great basic, cheap torch with decent light output. The choice of options (7135 x4, 7135 x8 etc) refers to the number of LED chips, so the higher the multiplier the brighter the light. Deal expires today so get in quick. You can get it a touch cheaper via the app.
Really well reviewed light - see https://brightbestlight.com/convoy-s2-led-flashlight-review/
You'll need an 18650 battery and a charger if this is your first light of this type.
I can recommend these little beauties. Great value at this price so I've ordered another.
Thanks OP