Features:3.9mm/5.5mm/8mm diameter camera to choose, 50mm to 5000mm focal length, allows clearer views and high definition images.Increase embedded lighting to extend field of view in dim environment.IP68 waterproof camera lens allows you using this inspection camera underwater or in a wet environment.With 8pcs adjustable LEDs lights which are bright and can clearly observe every detail.Built-in 2600mAh large capacity rechargeable cells, working up to 5 hours and you can charged it through connecting any USB device.It can be used for automobile inspection, pipeline inspection, air conditioning inspection, object search, etc. It is a home and industrial endoscope.