Currently trait:

Display：LCD 75*35mm Display window，show for 3 1/2digit,Max reads“1999”

Over range display：while over range，LCD display“1”

Power supply：AA 9Vbattery power supply

low voltage of the hint：  appear symbol

Cost power：static state<10mA  Max current<300mA（lower）

Current short circuit：2mA（250V/1000V）, 1mA(2500V）

Using of environment：temperature0℃~40℃, humidity30%RH 85%RH

deposited environment：-10℃~ +50℃，relative humidity<85%RH

Deposited environment: -10℃~ +50℃，

Figure: 195*148*85mm

Weight: about 850g (include battery)