Product introduction:
1. Built-in rechargeable battery, can be turned on when charging.
2. Automatic zeroing at startup.
3. Zero automatic tracking.
4. The cumulative frequency is 1~30 times.
5. Power supply: ac 220V (10%) / 50Hz dc 6V/4Ah (built-in rechargeable battery)
6. Operating temperature range: 0 ℃ ~ + 40 ℃.
7. Relative humidity: 85% RH.