Feature: 1. Versatile Use: The battery tester is designed for measuring the AC resistor of high precise capacitors and high precise resistors, suitable for battery production, maintenance, testing, and research. 2. High Accuracy: The battery meter ensures high accuracy. It measures the internal resistor and voltage of the battery accurately, demonstrating reliability and accuracy. 3. Multifunctional Design: The battery voltage tester is applicable to a wide range of batteries such as LiFePO4 batteries and storage batteries, adding flexibility to usage. 4. Easy to Operate: The battery internal voltage tester has a user friendly operating interface, making it convenient to use and operate without complicated steps. 5. Enhanced Efficiency: The battery voltage detector promotes efficiency in testing, saving time and increasing work productivity, for all your battery testing needs with accuracy and speed. Specification: Item Type: Battery Tester Material: ABS Battery Capacity: 1000mAh (Shipped with Built in Battery) Resistor Measurement Range: 1Ω - 200Ω Voltage Measurement Range: 1mV - +100VDC Test Signal Frequency: AC 1KHz Resistor Basic Accuracy: 0.5% Voltage Basic Accuracy: 0.5% Operating Environment: -10℃~40℃, Relative Humidity <80% Storage Environment: 20℃~80℃, Relative Humidity <80% Weight: Approx. 341.00g / 12.03oz. Package List: 1 x Battery Tester1 x English Instruction Manual1 x Accessories Note: 1. When measuring high voltage batteries, do not touch the metal parts to avoid electric shock. 2. Prohibit using beyond the voltage range and testing AC signals.