Vorth Endoscope Inspection Camera 1920P HD Borescope, 8 LED, 5M Semi-Rigid Cable. Sold by VorthDirect FBA

The Vorth Endoscope Inspection Camera with a 5 metre semi-rigid cable is £16.88 at Amazon, sold by VorthDirect.
It has an 8mm probe with a 2MP 1920×1080 HD sensor and eight adjustable LED lights, so you can see clearly into tight, dark spaces such as pipes, drains, engine bays, wall cavities and behind appliances.
The semi-rigid snake cable holds its shape while still bending freely, and the probe is IP67 rated, so it can work for up to an hour in 1m of water. That makes it useful for checking drains, air conditioning ducts and other damp places.
It works with iOS 9 and Android 4.2 or later phones through the free UseePlus app, which shows the live picture from the camera. Vorth says it has noise reduction for a smooth, stable image.
It is rated 4.2 out of 5 from over 860 ratings on Amazon. Handy for car repairs, plumbing jobs, finding leaks and general DIY.
Sold by VorthDirect. Check the listing for delivery options.