Question: how to connect sennheiser wireless headphones hd 4.50?
Answer: Setup and Connecting The 4.50 BTNC features an NFC chip on the left ear cup, making it simple to pair the headphones with an Android phone or mobile device. But if you don't have an NFC-compatible device, simply hold the power button in the On position for a few seconds, and the headphones will enter pairing mode.