The FB-R2013A multifrequency underground pipe locator from Forbest Products allows users to locate the pipeline and measure the depth. It comes with four frequency options: 512 Hz, 1 K, 33 K and 83 kHz. A variety of measurement modes for pipeline positioning (Valley Mode, Peak Mode, Broad Peak Mode, Peak Arrow Mode) can verify each other to ensure the accuracy of pipeline positioning. The built-in GPS helps to generate the pipeline drawing automatically. It also detects depth to 6 meters. It displays on a 3.5-inch LCD with backlight. The built-in rechargeable battery can last over 10 hours. 877-369-1199; www.forbestusa.com.