The N620DM | 12263020 from Yateks is a Borescope with Depth of Field(DOF) 7 to 80 mm (F), 3 to 30 mm (S), Viewing Angle 100 Degree (Front), 90 Degree (Side), Probe / Insertion Tube Temperature -20 to 70 Degree C, Operating Temperature -10 to 50 Degree C (Monitor), Probe / Insertion Tube Diameter 6 mm. More details for N620DM | 12263020 can be seen below.