1. Shell material: aluminum alloy + ABS
2. Connector material: nickel-plated
3. Input: 3.5mm
4. Output: Type-C
5. Function: support headphone control (iPhone does not support) / voice call
6. Small and mini appearance, easy to carry
7. Plug and play, easy and fast to use
8. Aluminum alloy fine frosting process, comfortable feel, no oxidation, wear-resistant and durable