The 5-watt Gen-Eye Hot Spot Transmitter for pipe and utility location from General Pipe Cleaners has four trace frequencies, and an LCD graphic display that indicates line resistance and current flow. Choose one of four line trace frequencies — 1 kHz, 8 kHz, 33 kHz or 65 kHz. The user can select the frequency and power that best suits the application. The graphic display with auto-backlight indicates battery level, output level, USB connection, connectivity, type of transmission and active frequencies. Long battery life keeps the unit operating for as much as 100 hours. 800/245-6200; www.drainbrain.com