MASTECH MAS830L Digital Multimeter – With a maximum display value of 1999 and polarity display for negative polarity, this digital Multimeter is widely acknowledged in the market for many academic, industrial, and commercial applications like physics, electronics, electrical, and many more. This device is very useful and effective which makes the work of electricians much simpler and easy. The operating temperature of this Multimeter is 0~40 degrees Celsius (32~104 degrees Fahrenheit) and the storage temperature is 10~50 degrees Celsius (14~122 degrees Fahrenheit). The relative humidity is <80 % RH, the altitude is <200m, the diode is of 2.7 V, and the continuity buzzer is <70+-30.