Digital Panel Meters
Specifications:

Display: 3 1/2-digit LCD
Input sensitivity: 200mV FS
Power supply: 9V DC (7 - 12V DC)
Decimal point selection: With wire jumper
Automatic polarity indication
Figure height: 0.52"
Sampling rate: 2 - 3 readings / sec.
Uaranteed zero reading for 0V input
High input impedance: > 100Mohm
Accuracy: 0.5%
Power consumption: 1mA DC