Digital Metal Detector with Headphones Brand_Bresser the user can check the

the user can check the tracking error of any mount in real time in his/her warm room (without autoguider support)

5 x 91 x 158 mm

and the included experiment kit

The 30mm 82° Series Waterproof Argon-Purged Eyepiece is a popular focal length in the upper-medium power magnification class providing both super-wide apparent field and generous eye relief

but also fits most other binoculars with a lens diameter of 70 to 120mm that have a 1/4 inch photo thread connection on the underside

Digital Metal Detector with Headphones Brand_Bresser the user can check theFeatures Detector finds precious metals buried up to 8 inches below the surface Seven different tone alerts identify types of hidden metals Large LCD screen provides information on depth and metal type and allows users to adjust sensitivity Pinpoint function helps narrow down where to dig Coil is water resistant so users can search shallow puddles and damp areas Padded arm cuff and adjustable length add comfort while searching Headphones included (2)