Bohr Active Noise Cancelling Wireless Over Ear Bluetooth Headphones with mic, HiFi Stereo Deep Bass, Foldable Headset for Travel, Work, Gaming, PC, TV, Cellphone

FREQUENTLY QUESTIONS AND ANSWERS 1. How to pair the Bluetooth ? Long press ON/OFF button for 5-10 seconds until Red and Blue light flash alternately Turn on the Bluetooth of your device and find "BH900" to connect. 2. How to turn on active noise cancelling function ? There is a ANC ON/OFF swith on the right of the headphones, press the ANC button to turn on or turn off the ANC function. 3. Wireless and Wired Connection Reliable Bluetooth connects seamlessly to all your Bluetooth enabled devices with 10-20m effective receiver range. Intuitive on board controls and built-in microphone. The headphone can be used as the wired headphone. 3.5mm AUX port with cable (included) for use in flight mode or with an MP3 device. 4. Why the volume control didn't work The volume control can work well. The volume of headphones is basic on Bluetooth device (phone / ipad and so on) You need to turn the volume of the bluetooth device to maximum. then can control the volume by the volume control of the headphones. Specification: Speaker Unit: 40mm Sensitivity: -42+/-3dB Impedance:?2.2k Frequency range:30~16000Hz Bluetooth version: CSR4.1 operation distance:33ft Battery: 3.7V 300mah Charging time: 2-3hours What's in the package: 1*Active Noise Cancelling Bluetooth Headphone 1*Audio Cable 1*USB Charger Cable 1*User Manual