Mars search coils are 100% waterproof and are protected against electrical interference

Maximum Length: 22 inches

Independent threshold and gain controls let you tune sensitivity to the ground you're hunting without losing stability

Runtime is 15–20 hours on a single 9V alkaline

keeping signals clean as ground conditions change across a site

Tesoro 12" x 10" Open Gray Metal Detector Search Coil Cover detector wrench Mars search coils are 100%Tesoro 12 x 10 Open Gray Search Coil Cover. This plastic cover will protect your search coil from scuffs and scratches. This coil cover fits the Tesoro 10 x 12 Widescan Coil. Protect your metal detector search coil when in use. This hard plastic gray cover will prevent scuffs and scratches.