Schonstedt Sonde, 512 Hz Micro-Mini (for Rex, XTpc series & XT512)
2-1/4″ long x 3/4″ dia.
Battery: 1- N type
Depth: 8-10 feet through all pipe materials
(Unit must be equipped with this option/software before this accessory will operate. XT units can only operate with a single sonde frequency.)