Product Features:
*Built-in noise reduction circuit inverting precision ANC, it can effectively cut off 85% of the background noise.
*dedicated high-quality noise-style 40mm diameter driver unit, to ensure the highest quality.
*3.7v lithium ion battery,it was recharged without replacing batteries.
*two modes of operation, to choose :noise reduction state (subject to a battery), the normal state (without battery) ,it was easy to switch.
*earmuffs imported sponge, soft and comfortable, long wear without fatigue.
Technical indicators:
1. Category: Active noise canceling headphones
2. the input terminals: DCФ3.5DC Plug 4
3. working voltage: 3.7V
4. the maximum output power: 90MW
5. the noise level :18-20db
6. the signal to noise ratio (SNR): ≥ 90db
7. power supply: 120mA lithium battery
8. Rated operating time:> 20h
9. noise reduction modes: dual-microphone noise feedback
10. Speaker diameter: Ф40mm
11. Speaker Impedance: 32Ω
12. speaker frequency response: 20Hz - 20KHz
13. Speaker sensitivity: 115dB
14. the noise level: ≤-78dBA
15.the dynamic range: ≥ 78 dBA
16. Distortion THD: ≤ 0.1%
17. Stereo crosstalk: ≤ -52 dBA
18. headphone wire length: pvc wire, 1.5m