The XT512 Sonde and Camera Locator from Electric Eel combines portability with the low-frequency sonde and passive locating capability. The user can locate and determine the depth of a sewer/pipe inspection camera or a small sonde, or blockages and obstructions in nonmetallic pipe. It has 512 Hz frequency mode operation, passive detection of 50 or 60 Hz and sonde, one-button depth measurement, digital readout display of signal strength (peak), audio and visual output, battery and sensitivity indicators, a 9-volt single battery with a battery life of 18 hours with intermittent use, and 3 1/2-inch digit reflective LCD display. The unit is ergonomic and lightweight at under 2.5 pounds. It is 26 inches extended and 15.5 inches retracted. 800/833-1212; www.electriceel.com.