1. Small size, easy for single to master, easy to carry without load.
2. Easy to install.
3. The nixie tube is a battery shape. It is divided into four cells in the middle, one cell is 25%, two cells are 50%, three cells are 75%, and four cells are 100%. The corresponding voltages are 6.6V, 7V, 7.4V, 7.8V. When the digital tube is not lit, indicating that the voltage is lower than 6.6V, the battery needs to be charged.
4. Size: 17 x 37mm
5. Working temperature: 0-45 degrees Celsius
6. Working voltage: 6.8-8.4V
7. Voltage error: 0%
