Upgrade your sound experience 
ACTIVE NOISE CANCELLING (ANC) actively reduce noise wireless headphone, 23db reduction 180HZ.
Wireless version: V5.1.
Wearing method: head wearing type.
Communication distance: about 10 meters.
Battery capacity: 400mAh.
Battery type: polymer lithium battery.
Talk time: approximately 16 hours.
Music playing time: noise reduction opening about 12 hours / complete wireless-70% volume about 16 hours.
Charging time: about 1.5 hours.
Wired audio input: supports 3.5mm. 
Wireless indicate lamp: red and blue flashing.
Impedance: 32 ohms.
Sensitivity: 115dB/V ± 3dB.
Frequency response range: 20Hz-20KHz.
ANC frequency: 23dB,20-800Hz.