For less that £50 from Amazon I think it's great value - It took around a week to arrive. It plugs into your PC/Laptop USB port or most android phones and tablets.
The diameter is just less than .2 including a focusable right angle mirror and has adjustable illumination.
Image quality is good.
https://www.amazon.co.uk/Teslong-Boresc ... T155YGFX3Y
Inside my .22lr Finnfire barrel with a 8" android tablet (Won't work with Ipad or boing)
