Features:LCD screen, display information comprehensively and clearly. Configuration of intelligent fan, which can dissipate the heat effectively and quietly. Test various batteries, direct current power supply, and charging data lines. Specification:Current measurement range: 0.00A ~ 20A, Resolution accuracy: 0.05ACapacity accumulation range: 0 ~ 999.999Ah, Resolution accuracy: 0.01AhPower accumulation range: 0 ~ 9999.9Wh, Resolution accuracy: 0.01WhPower measurement range: 0000.00 ~ 2999.99W, Resolution accuracy: 0.01WImpedance measurement range: 1 ~ 999.9Ω, Resolution accuracy: 0.01 ΩTemperature measurement range: 0 ~ 99 ℃, Resolution accuracy: 1 ℃Timing maximum time: 999 hours 59 minutes 59 seconds, Resolution accuracy: 1 secondTiming measurement reminder settings: countdown 24 hours, any value can be setSmall current standby to remind the threshold parameters and timing: <2W / 0.5 hours; > 0.5W begin timingRefresh time: > 500mS / timesMeasurement rate: about 2 times / secOverflow Reminder Set Range: 0.2 ~ 100ADisplay Type: Micro power LCD Module LCM Green Backlight Chinese & English DisplayOperating temperature: -10 ~ +60 ℃Interface: USB, 5.5mm jack, Mini USB, Micro USB, Type-CWorking humidity: 10 ~ 80Working pressure: 80 ~ 106kPaSize: Approx. 156 x 96 x 58mm / 6.1 x 3.7 x 2.2inchWeight: 631gNote:1. Please turn down the knob to the end counterclockwise before using, and then turn up slowly.3. Several tested power supply can not be connected simultaneously.4. The current adjustment knob should be regulated slowly.Package Include:1 x Fan1 x USB Cable2 x Crocodile Clip1 x Manual(Other items in the picture are NOT included).