| Quantity | 5 pcs |
| Motor diameter | 12 MM |
| Electrical thickness | 2.8 MM (not including sponge) |
| Line length | about 18 MM |
| Working voltage | 2-5 V |
| Rated voltage | 3.7 V |
| Current | 0.07 A |
| Service life | 10000 hours |
Features:
Micro， compact and lightweight.
Exquisite manufacture.
