Item not as described. Section 4.4 (2) of the user manual describes the use of a non-existent or non-functioning locking function. I have used several of these endoscopes and they all had this feature as stated in the attached product description.
π Nikon ACULON A211 8x42 Binoculars: High Quality Optics for Exceptional Viewing
15 Review
Enhance Your Stargazing Experience With Orion'S Premium Telescope Accessory Kit (1.25-Inch, Silver)
21 Review
Nikon ACULON A211 8248 10x50 Binoculars (Black)
20 Review
Explore The Night Skies With The Orion SkyQuest XT8 Classic Dobsonian Telescope
12 Review