How to pair 2 devices at the same time:

Step 1: Press and hold the power button for 6-7 seconds to power on, you can see the indicator light flashing red and blue alternately. At this time, turn on the Bluetooth on your first device, find "KH-23" and click to connect. The indicator will turn blue when connected.

Step2: After connected to the first device, turn off the Bluetooth of your first device, and then the Bluetooth headset will enters the pairing status automatically. Turn on the Bluetooth on your second device, search "KH-23" and click to connect.

Step3: After connected with second device, turn on the Bluetooth on you first device, search "KH-23" and click to connect. Now the Bluetooth headset is connecting with 2 devices.