Features: Voltage meter is small in size, compact-design. Supply voltage: DC8-100V,Measuring range: DC8-100V. You can monitor the battery voltage status at any time-, You will never need to worry about batteries- going- dead. Could measure the voltmeter more accurate, helping to finish your work more effectively. Suitable for high&low power distribution cabinets, exhibition cabinets and stands, photovoltaic inverter flow, assembly line test, electronic maintenance, electronic DIY. Package Includes: 1xUSB Voltage Meter Specifications: Material: palstics Size: approx 4.7x2.9x1.9cm/1.9x1.1x0.75-inch Power-supply voltage: DC8-30V Measuring range: DC8-30V Ternary lithium-battery L measurement: String to 20 (power-off memory) Lead acid battery P-measurement: DC12V,DC24V, DC36V Lithium- iron battery F-measurement: 3 to 23 strings- (power-off memory) note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.