Multiple Circuit Protections: Builtin anti burn, overload, overvoltage, and reverse connection protections ensures during accidental misuses High Precisions Smart Measurement: Equipped with high precisions chips for stable readings and trueRMS measurement, meeting professional electricians ' accuracy needs Versatile Multi Function Use: Measures voltages, current, resistance, capacitance, NCV detections, and continuity, suitable for various electrical tasks Bluetooth-compatible Remote Data: Supports Bluetooth-compatible connection to mobile apps for real time data viewing and remote convenience Auto Ranging Function: Automatically identifies measurement ranges without manual, making operations simple for both beginners and experts, Manufacturer: CAZSTYK