The "To Keep Up" Wiki

Boltune Wireless Stereo Earphones BT-BH001

This info from https://manualzz.com/doc/54512487/boltune-bt-bh001-earbud-headphone-user-guide

1	+	Volume + / Next
2	Δ	Multifunction
3		LED indicator / Microphone
4	-	Volume - / Previous

Charging

Connect with USB adapter. Fully charged when indicator turns blue.

Pairing

Place earphones and Bluetooth device within 3 feet of each other
Press and hold Multifunction Δ until LED flashes red and blue alternately: Earphones are in pairing mode.
Activate Bluetooth on iPhone/iPad, search for nearby. Find “Boltune BTBH001” in search results, tap to connect.
Once connected, blue LED will flash.

If earphones cannot pair with your Bluetooth device, press and hold the Multifunction Δ button when earphones are off for 10 seconds until LED indicator flashes purple twice (reset to factory settings). This clears pairing history. Then follow instructions above.

Operation and Functions

Power On	Press and hold Multifunction Δ for 1 second
Power Off	Press and hold Multifunction Δ for 3 seconds
Enter pairing mode	Press and hold Multifunction Δ for 5 seconds
Play/Pause	Press Multifunction Δ once
Volume + / -	press + / - button
Next/Previous track	Press and hold +/- button
Answer or hang up phone	Press Multifunction Δ once
Decline incoming call	Press Multifunction Δ for 1 second
Redial last call	Press Multifunction Δ twice
Reset to factory settings	When earphones off, press and hold Multifunction Δ for 10 seconds, until LED indicator flashes purple twice.