This module uses high quality LED digital tube manufacturing， ultra-high brightness， but also clearly shows that even in the sun. This module uses imported MCU sampling and display voltage， and the software has a lot of data processing， the display precise and stable. It is a full-chip technology， exquisite workmanship， while ultra-small. It has reverse polarity protection， even if it does not reverse damage to the module.

Main Features:
Refresh rate: About 200ms time
Measuring range: 0V-9.9V
Current: less than 8mA
Display: three 0.36 inch digital pipe
Power supply: 4V-30V
Input impedance: About 100K