Features and Benefits:

• Professional Load Test Function
  Unlike basic test lights, the CT100 features a professional load test function (DC 5‐30V, 1.2A Max). Hold the button for 5 seconds to check battery and circuit load capacity, helping identify aging batteries, weak connections, and voltage drops for faster and more accurate repairs.
• Precision Voltage Testing
  Equipped with a clear backlit digital display, the CT100 measures DC voltage from 3.3‐65V with 0.1V resolution. Accuracy is rated at �0.1V from 3.3‐60V and �0.2V from 60‐65V, providing dependable performance for professional technicians and advanced DIY users.
• Polarity Protection and Anti-Reverse Design
  Dual-color backlighting displays red for positive and green for negative polarity, while on-screen positive and negative indicators activate instantly when the probe contacts a circuit. This intuitive design helps prevent reverse connections and protects sensitive vehicle electronics.
• Safe Battery-Free Operation
  Battery-free operation eliminates maintenance and downtime while improving testing safety. Integrated protections include overvoltage alerts, overheating warnings, and component status monitoring for reliable daily diagnostic use.
• Intuitive Status Light Indicators
  Color-coded indicators provide instant polarity confirmation, while additional alerts display overvoltage (“H”), overheating (“Hot”), and lamp abnormality (“ER1”) warnings to keep operating conditions visible during testing.
• Extended Test Lead for Easy Operation
  The 12.5-foot extra-long test cable improves access to hard-to-reach areas without repositioning the tester. Universal 4mm banana jack connections support interchangeable probes and clips for flexible testing applications.
• Wide Vehicle Compatibility
  With a 3.3‐65V testing range, the CT100 supports 12V, 24V, and 36V vehicle systems. Ideal for cars, trucks, RVs, and commercial vehicles, it is perfect for checking fuses, verifying connector voltage, testing circuit integrity, tracing wiring issues, and diagnosing electrical faults.

The CT100 is a professional automotive circuit tester designed for fast, accurate, and reliable electrical diagnostics. It quickly identifies polarity, performs load testing, and provides clear audible and visual alerts to simplify troubleshooting and reduce guesswork during repairs.

Built for durability and everyday shop use, the CT100 features a rugged design, a long oil-resistant cable, and interchangeable probes and clips for versatile testing applications. Compatible with cars, trucks, RVs, and EVs, it delivers quick and precise results without complicated setup, making it ideal for both professional technicians and DIY users.