1. Impedance: 32 ohms
2. Speaker diameter: 40mm
3. Sensitivity: about 120dB/m
4. Frequency response: 20-20000HZ
5. Plug type: 3.5mm stereo system
6. Effective range: about 120cm
7. Rated power: 3mW
8. Earplugs/earmuffs material: PU
9. Weight: about 220g
10. Cable length: 1.2m
11. Features: detachable cat ears, comfortable and beautiful, soft material, telescopic adjustment, free to adjust the size, comfortable to fit the head, easy to carry, 1.2m long power cord, compatible with a variety of smart phones and tablets