The 5-watt Gen-Eye Hot Spot Transmitter from General Pipe Cleaners has four trace frequencies, and an LCD graphic display that indicates line resistance and current flow. Users can choose 1 KHz, 8 KHz, 33 KHz or 65 KHz line trace frequencies to suit 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.