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SeekTech ST-305 Transmitter LED Energized Lines from Ridgid is a powerful and portable tool used to locate buried utilities or cables when used with the SR-20 Utility Locator (sold separately). The transmitter has three connection options, including direct connection with attached clips, induction using transmitter coils, or induction through an optional SeekTech inductive signal clamp. The ST-305 provides significant benefits for professional locators who want to avoid potential hazards during excavation operations. Ideal for electricians, plumbers, construction workers and other professionals working with underground utilities, the transmitter comes in yellow color and operates at 1,83 kHz, 33 kHz frequencies, delivering up to 5W of power while maintaining a maximum open circuit voltage.