| Model | C1 (Temtop C1) |
| CO₂ Measurement Range | 400 – 5,000 ppm |
| CO₂ Resolution | 1 ppm |
| CO₂ Accuracy | ±(40 ppm + 5%) within 400 – 2,500 ppm |
| Temperature Measurement Range | –10 °C to 60 °C (14 °F to 140 °F) |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.5 °C |
| Humidity Measurement Range | 0 – 99 % RH |
| Humidity Accuracy | ±3 % RH |
| Battery / Power | Built-in battery ~800 mAh |
| Operating Modes | Performance mode (CO₂ sampling every 1 minute) / Power-saving mode (sampling every 10 minutes) |
| Battery Life | ~30 days (Performance mode) or ~70 days (Power-saving mode) |
| Operating Environment | –10 °C to 60 °C; high humidity conditions (0 – 99 % RH) |
| Dimensions / Weight | 3.5 × 2.7 × 0.7 inches (~ 89 × 68 × 18 mm); ~110 g |
| Display | 3.3-inch segmented LCD display |
| Alarm Function | Color indicators (green / yellow / red) based on CO₂ levels; optional buzzer with on/off control |
| CO₂ Calibration | Manual calibration (press and hold Power + Mode buttons) |
| Bluetooth / App Support | Only C1+ version supports Bluetooth/app; standard C1 version does not support Bluetooth (per official documentation) |