| Item Number | Bluetooth | Bluetooth Chip | OKI Chip |
| SP33-E | Yes |
Bluetooth Chip AMB2300, A quality V4.0 |
Yes |
| SP33-E1 | Yes |
Bluetooth Chip AMB2300, A quality V4.0 |
No |
| SP33-E2 | Yes |
OEM Bluetooth chip, B quality V2.0 |
Yes |
| SP33-E3 | Yes |
OEM Bluetooth chip, B quality V2.0 |
No |
| SP33-E4 | No |
No |
Yes |
| SP33-E5 | No |
No |
No |
