Small handheld depth sounder, of extremely simple opération, particularly intented for pneumatic or dinghy sailors. Equally useful to scubadivers : it gives depth indication relative to the bottom, distance to a rock or to an underwater quay. Totally waterproof. the Echotest II sounds up to 80 mètres, and can be used at a maximum depth of 50 mètres. Echotest opérâtes only when immersed.
