| Accuracy | ≤ ±1 HD |
| Display parameters | Hardness/Average/** Value |
| Measurement unit | HD |
| display range | 0HD~100 HD |
| Measurement range | 0HD~100 HD |
| resolution | 0.1 HD |
| Low Voltage prompt | √ |
| Automatic shutdown function | √ |
| Operating Environment | Temperature: 0 ℃~ 50 ℃ Humidity: 80% RH |
| Power Supply | 2 AA batteries |
| size | 176mm*65mm*27mm |
| Weight (without batteries) | 170g |
| Standard configuration | host |
| optional | USB Connectivity Cable and Software/Bluetooth Adapter and Software |
Warranty days: 730 days
1. For product quality problems caused by non-human products of instruments and equipment, the manufacturer will provide free warranty services during the warranty period;
2. There is no warranty period for fragile and consumable parts, and if you find product quality problems after receiving the goods, please apply for return and exchange within 7 days, and you will not wait for the overdue ones;