Specification: Item Type: Battery Voltage Resistance Meter Material: ABS Power Supply: Built in 18650 lithium ion rechargeable battery Battery Capacity: 1000mAh Measuring Range: 0-999M Power Supply: 5V Test Voltage: 0.5-9.99V (forward); -0.5-(-9.9V) (reverse) Accuracy: 1% Repeat Error: 1% Application: Battery production line test, warehouse battery sampling inspection, photovoltaic inverter, battery maintenance, electronic DIY Package List: 1 x Battery Voltage Resistance Meter 1 x User Manual or 1 xBattery Voltage Resistance Meter 1 x User Manual 1 x Charging Cable Note: 1. This product is not suitable for AA/AAA carbon battery measurement.2. During measurement, if the voltage or internal resistance of the battery under test is found to be 0, the contact may be poor, and the battery can be reinserted and measured again.3. This product is not waterproof.