Ridgid ST-305R SeekTech Transmitter Provides flexible power options of either a Lithium-Ion 18V rechargeable battery or 6 C-cell alkaline batteriesLightweight, compact transmitter that delivers up to 5 Watts of powerTransmits two frequencies simultaneously to allow optimal frequency selectionRAM tablet mount compatibleAudio feedback confirms a good circuit before beginning a trace Description The RIDGID SeekTech ST-305R is a compact yet powerful multi-frequency transmitter. It can be used with any RIDGID SeekTech or NaviTrack receiver to find buried conductors such as pipes, cables, and wires. With its battery shoe, the ST-305R can be powered by a Li-Ion 18 V rechargeable battery or six alkaline or NiMH C-cell batteries.