Magus Active Noise Cancelling Headphones ANC Headphones

I. Descriptions:
Never before could a trip be so quiet. Never before could a world be so pure. There is nothing but you and the music.
It's Magus who cancelling 95% of the environment noise, and offering you the Hi-Fi level music entertainment.
Designed by CASC (China Aerospace Science and Technology Corporation) for China astronaut, adopted the unique technologies including ANC, LNC & DSR, it's just so amazing!

II. Features:
1. Active noise cancelling headphone
2. Listening & speaking noise cancelling
3. With wire
4. Built-in Lithium Battery, 5V USB charging
5. Hi-Fi sound performance

III. Specifications:
1. Brand: Magus
2. Model Code: Origin C
3. Style: In-ear
4. Frequency Range: 20~20KHz
5. Impedance: 32Ω
6. Sensitivity: 118 dB/mW
7. Max. Noise reduction depth: 29dB
8. Noise reduction range: 20Hz-3000Hz
9. Rated Voltage: 3.7V
10. Battery life: 20 hours
11. Weight: 23g
12. Material: ABS/PC