First-Time Pairing: Press and hold the Multi-Function Button (the power button) on the right ear cup for 2 to 3 seconds to turn them on. They will automatically enter Bluetooth pairing mode. Look for "soundcore Q20i" in your phone or PC's Bluetooth settings and select it to connect. [1] (https://support.ankerwork.com/s/article/Q20i-User-Guide-A3004), [2] (https://www.youtube.com/watch?v=05ybDctClvg), [3] (https://www.youtube.com/watch?v=YIa7nCG26cM&t=80)Manual Pairing (New Device): If you need to connect to a different device later, turn the headphones off, then press and hold the power button for 5 seconds until the LED indicator flashes blue rapidly to enter pairing mode manually. [1] (https://support.ankerwork.com/s/article/Q20i-User-Guide-A3004), [2]