| Specifications | MS6208A | MS6208B |
| Contact Measurement | 50~1999RPM | |
| ±(0.03%+2) | ||
| Non-Contact Measurement(Photo) | 50~1999RPM | |
| ±(0.03%+2) | ||
| Measuring Distance | N/A | 50mm~250mm |
| Auto Power Off | 30s | 30s |
| MAX/MIN/AVG Functions | √ | √ |
| m/min,m/sec,ft/min,ft/sec,in/minunit selection | √ | |
| Data Logging | 100 groups | 100 groups |
| Data Hold | √ | √ |
| Display Backlight | √ | √ |
| Low Battery Indication | √ | √ |
| General | ||
| Power Supply | 4x1.5AAA | |
| Product Size | 193x60x29mm/7.5"x2.4"x1.1" | |
| Product Weight | 120g/0.3Ib | |
| Category | CE | |

Source: https://www.meterstesters.com/products/digital-tachometers/digital-tachometer-ms6208b.html