Dimensions: U.S.   Length 11.5 in   Height 27.5 in   Width 4 in   Operating Weight 5 lb   Maximum Locating Range: U.S.   Beacon 10 ft   Line 15 ft   Batteries: 6 C-cell alkaline Battery life: approximately 40 hours Battery saver: unit shuts off after 5 minutes if no key is pressed 300ST Specifications Dimensions: U.S.   Length 11.5 in   Height 27.5 in   Width 4 in   Operating Weight 5 lb   Batteries: 6 D-cell alkaline Battery life: approximately 150 hours