RIDGID 16728 Remote Transmitter (512 Hertz Sonde) for Underground Pipe Location Attach remote transmitter to drain cleaning cable or a water jet hose to locate pipe underground Flashing LED to indicate that sonde is transmitting and ready to operate as a beacon during underground pipe location Meets FCC Class B and EN 55022 Class B requirements Adapters (catalog # 19263, 19268, 19273, and 19258) attach transmitter to drum machine or sectional cables provide versatility in locating underground pipe and line detection Constructed with a solid steel core, abrasion-resistant urethane coating, and stainless steel wear ring for durability