Battery
1*9V ( baterry not included )
Feature
Earphone Jack, Volume,Sensitivity Adjustment
Frequency
19 KHZ, LCD control
Battery Life
Up to 15 hours
Stretch Length
42-52 inches
Detection Depth
Max: 1.5 meters (50 * 50 * 1.2 cm Aluminium Board)
Basic Sensitivity
U.S.coin (12-15 inches )