| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
| Differences | |||
| NO. | Contents | A version (LED version) | B version (Digital tube version) |
| 1 | Working temperature | 280a, 350a, 400a(Choices) | 100a-400a (Adjustable) |
| 2 | Display screen | LED | Digital Tube |
| 3 | Sleep time | default 10 min (no adjustable) | 1-30min(Adjustable) |
| 4 | Temperature compensation | no | ±50a(Adjustable) |
| 5 | Temperature unit | a | a |
| 6 | Factory temperature | 280a | 300a |









