ALLOSUN Battery Internal Resistance Meter/Battery Voltage Tester/Digital Battery Analyzer Lithium-ion, nickel-hydroxide lithium-manganese cells or assembled battery Display Backlight button Function/Range switch Hold button Holster Test Probe <span class="a-text-bold">Battery Voltage</span>:  0~1.999/ 2.00~19.99/ 20.0~50.0V <span class="a-text-bold">Resistance/ Battery Internal Resistance</span>:  0~199m/ 200m~1999m/ 2.00~19.99 <span class="a-text-bold">Negative Polarity Indication</span>:  -shown on the display automatically <span class="a-text-bold">Operating environment</span>: <span class="a-text-bold">Temperature Coefficient</span>:  0.1specified accuracy/(&lt;18 or &gt;28) <span class="a-text-bold">Battery</span>: 9V battery, 6F22 or equivalent (1 piece) <span class="a-text-bold">Size</span>: 150x83x44mm <span class="a-text-bold">Weight</span>: 315g