Castor features a unique design with two stacked dynamic drivers. One driveris dedicated to producing frequencies around 20-200Hz for bass output, while the other diverhandles mid and high frequencies.
| Colour | Harman NO MIC |
| Brand | Unbranded |
| Type | Earbud (In Ear) |
| Model | 1100 Series |
| Connectivity | Bluetooth |
You will find that the unbranded build things simple, without any company names distracting from the music.