Cobra Wader Series Metal Detector w/ 10" Open Cobra Max Coil 12.5 kHz operation for exceptional depth, Fully automatic tuning, Fully automatic ground balance Full range VLF discrimination, Adjustable detection depth, Adjustable volume control Fully adjustable rod with cam-lock, Padded arm rest 12 volt AA battery system, Control unit and coil can be submerged Maximum extended length of 49in., Min dive length of 37in., weighs 4.5 lbs., 5yr Limited warranty