Specifications: Displaying:Max. Displaying:4000 Sampling rate:approx. 3 times/second Polarity indication:Automatic negative polarity indication Over range indication: OL shown on the LCD Operation environment:0-40,R.H.< 75%. Storage environment:-10-50,R.H.<80%. Power supply:(Size AAA)1.5V2 Size:46*28*28cm Material: plastic Color: black&orange Features: . Made from qualified material, it is reliable and safe to use. . Auto-ranging pen-type digital multimeter with a 6000 counts LCD display and a backlight. . Five functional buttons instead of the traditional rotary switch enables one-hand operation, which makes your measurements more convenient and efficient. . With data hold function for max convenience. . Auto power off for low power consumption and energy saving. . With flashlight, you can use it in dark environment. . Comes with carry bag for convenient store and carry.