12 in 1 measurement: voltage, current, power, battery capacity, impedance, parameters such as temperature, energy and time,etc. Manganin material: fast charging 

Voltage measuring range:  4V ~ 30 V               Resolution precision: 0.01 V   Current measuring range: 0.00A ~ 5.00 A             Resolution precision: 0.01 A Power cumulative range: 0 ~ 999999 Wh             Resolution precision: 0.001 Wh Capacity range : 0 ~ 999999 mAh              Resolution precision: 0.001 Ah Temperature:0°~ + 80 °                  Resolution precision:1  ° D+Voltage: 0.000V ~ 2.999 V              Resolution precision: 0.001 V D-Voltage:  0.000V ~ 2.999 V                Resolution precision: 0.001 V Load impedance: 0~ 999 ohm                   Resolution precision: 1 ohm Power metering range: 0 ~ 299.999 W               Resolution precision: 0.001 W Timing maximum time: 999 H 59 M 59 S                 Resolution precision: 1 S Time to refresh: > 500 ms/time > 500 ms/times         Product size: 66 x 24 x 15 mm Since the power flow: < 0.003 A(<  3mA  ) Working temperature:  - 10 ~ + 60 ° Working humidity: 10 ~ 80 (no doubt) The pressure of work: 80 ~ 106 kpa   Measurement rate: 0.5 times/s Use large equipment of the same metal manganese bronze sampling resistor  (1.0 mm diameter metal manganese bronze material < 0.05R)   Cumulative capacity range: 0-99999 mah precision: 0.001 Ah (New features or D+ D- Voltage )

Specifications: Product size: 65 x 24 x 14 mm Package size:6×11cm Net weight: 16g

Packing content: 1 x Digital USB Voltmeter Tester

Important Tips:

1)Backlit the default value is 10 seconds automatically shut down, if you need to close a backlight or normally open backlighting, please in double-click backlit screen button or click the button to adjust, thank you!   2)When the ambient temperature changes or the outside heat conduction to tester causes the current to not return to zero and the display shows 0.01A or 0.02A or otherwise,Please Hold on the key buttion then insert to USB Charger It can make the current temperature of the ambient current zero calibration,After the zero can more accurate measurements.And when in Zero calibration,the output can not have any load current consumption, so usb tester display 0.00A

3)Backlight default time is 10S time, through the key button, switch to the BL interface: 10S time interface, double-click or three-click to increase(+) time or decrease(-) time the backlight time ,and the same time  backlight switch "BL: OFF(time) ~BL: ON(time)1S ~ 59S range" Increase(+) or three-Click(-) after the reduction, then long press key is a continuous increase in the reduction.To meet the individual needs of users. BL: 10S→ USB tester default backlight time is 10S, 10S automatically turn off screen brightness BL: ON→USB tester backlight is on, always on BL: OFF→USB tester backlight is off, there is no backlight