PD Meter
General Details
PD Meter GD8405T offers simple function of near vision PD, the near vision PD will automatically calculation by devicde
Specifications
- Measurement range: 45-82MM in 0.5MM steps;
- Focus range: 30CM to Infinity;
- Illumination: LED;
- Automatic shut off: 1 minute or switch off;
- Power supply: 2AA batteries