Overview 

The Autool BT210 Car Circuit Tester is a compact and reliable diagnostic tool designed for 9–30V automotive electrical systems. It features four essential testing modes: voltage measurement with 0.1V accuracy, continuity testing for identifying open or closed circuits, polarity detection with red/green LED indicators, and temperature measurement via a built-in sensor. The tester is powered directly from the vehicle’s battery using a 1-meter cable with alligator clips, ensuring constant power without the need for separate batteries. A backlit TFT display clearly shows test results, while the integrated LED work light improves visibility in low-light or confined spaces. The BT210 also includes automatic overload protection, cutting off power if voltage exceeds 30V or current goes beyond 10A. Durable and easy to use, it is suitable for cars, motorcycles, and light trucks, making it a practical tool for quick electrical fault detection in both professional and DIY settings.

Features

• Compatible with 9–30V automotive electrical systems

• Four test modes: voltage measurement (±0.1V), continuity testing, polarity detection, and temperature sensing

• Red/green LED indicators for quick polarity identification

• Backlit TFT screen for clear, real-time readings

• Integrated LED work light for use in dark or tight spaces

• Powered directly via a 1-meter cable with alligator clips

• Automatic overload protection (cuts off above 30V or 10A)

• Durable, compact, and easy to operate

• Suitable for diagnosing electrical issues in cars, motorcycles, and light trucks

• Ideal for both professional technicians and DIY users