| Name | Spieth H2 | Spieth H4 | Spieth H6 | Spieth H10 |
| channel | 2 | 4 | 6 | 10 |
| Band | 10 | 10 | 10 | 10 |
| Multi-channel noise reduction | 6 | 9 | 12 | 12 |
| DFC | ✓ | ✓ | ✓ | ✓ |
| Wind noise manager | Level 1 | Level 2 | Level 3 | Level 5 |
| Loud sound block | Level 1 | Level 2 | Level 3 | Level 5 |
| Multi-channel expansion | 2 | 4 | 6 | 10 |
| Program | 2 | 3 | 3 | 4 |
| Intelligent volume recording | ✓ | ✓ | ✓ | ✓ |
| Sleep mode | ✓ | ✓ | ✓ | ✓ |
| Intelligent frequency spectrum analysis | ✓ | ✓ | ✓ | ✓ |
| Maximum output control | ✓ | ✓ | ✓ | ✓ |
| Button | Rocker Switch | Rocker Switch | Rocker Switch | Rocker Switch |
| Program switch indicator | ✓ | ✓ | ✓ | ✓ |
| Low battery indicator | ✓ | ✓ | ✓ | ✓ |