Potensic Digital Endoscope Borescope with Waterproof CMOS Camera and 3.5 inch Built-in Color LCD Screen – 6 ft/2m Cable, 0.32 inch Camera Diameter, 4 Zoom Options

Zoom Function and Brightness Control.
4 X Zoom function and 360 image rotation function, and Light Source: 1W LED flash light. Adjust the brightness through the button.
Capture Images (JPG) or Videos (AVI)
Users can capture images (JPG) or videos (AVI) on the TF card (up to 32G). The monitor can be detached from the unit for remote viewing.
Comfortable Design.
Users can control all the keys with one hand easily,and the adjustable handle offers extra comfort.
Specifications:
Display: 3.5" color LCD with 320*240 pixels (QVGA) resolution
Tube Camera: 300,000 pixels
Video Resolution: 320x240/640x480/1280x720
Image Resolution: 640x480/1600x1200/2048x1536
Data Storage Media: 2GB MicroSD card slot (supports up to 32GB)
Camera Head: 0.32 inch diameter with 6 pcs of adjustable LEDs
Depth of Field: 3.15 inch-infinity
Probe Length: 6ft/2m
Probe and Camera Head Protection: IP67
Operating Temperature: 0-45 degree (32-113 degree F)
Power Source: 4 x AA batteries (NOT included)
Accessories including hook and magnetic tips
Ideal for industrial such as automotive, electrical, plumbing, heating, ventilation, air conditioning, refrigeration and general home inspection, building and home construction, aviation, vehicles maintenance.
Note: If some of the button can't be pressed to work , you could try to re-plug the TF card in the card slot.