Magnet Source POLEIND Magnetic Pole Indicator
POLEIND
Simply point the North-South pole indicator toward the magnet and read the pole letter in the viewing hole. POLEIND01 4.57" L × 1" W × .44" Thk.
The electronic North-South pole indicator features LED lights to identify pole locations. Includes pocket clip, on/off switch and 4 LR44 batteries. POLEIND02 5.65" L × .875" W × .885" Thk.