Air conditioning duct detector

Unknowingly, the summer footsteps quietly coming
Summer, what are you most afraid of?
- yes, that is, air conditioning, imagine if the air conditioning suddenly is broken,how bad mood it will be.
- do not be afraid, air conditioning duct detector thelp you solve the problem, and give you back good mood.

Air conditioning duct detector with 5 mm diameter 20 meters cable,
6,17 mm camera suitable for 6-40 mm diameter air conditioning duct, 23 mm camera for 30-100 mm diameter duct (optional)
Video, audio recording;meter counter and keyboard camera function optional.