Harmony 2 - Buttons, Indicators & Function Table – Avantree Support

Speaker Overview

Batches from T25H1 Batches before T25H1

Button Functions

No.	Button	Function
①	Multi-function	- Press and hold for 2 seconds to power the speaker on or off. - Press once to enable or disable mute (Broadcasting mode). - Press once to play or pause audio (Bluetooth mode).
②	M	- Double-click to switch between Broadcasting and Bluetooth mode. - Press and hold for 5 seconds to enter pairing mode.
③	+ / –	- Press or hold to increase or decrease volume. - Press and hold + and - together for 5 seconds to reset the speakers.

LED Indicators

No.	Indicator		Meaning
A	Flashing blue		Power on
	T25xx batches	Flashing red & blue	Pairing (Bluetooth)
		Solid blue	Connected (Bluetooth)
		Flashing white	Pairing (Broadcasting)
		Solid white	Connected (Broadcasting)
	T24xx batches	Flashing red & blue	Pairing (Bluetooth & Broadcasting)
		Solid blue	Connected (Bluetooth & Broadcasting)
	Flashing red		Low battery
	Solid red		Charging
	Off		Fully charged or power off
B	Flashing white		Charging in progress
	Solid white		- Fully charged - Battery level indicator

Transmitter Overview

Button Functions

No.	Button	Function
④	ON / OFF	Slide to turn the transmitter ON / OFF.
⑤	Audio Input	Switch to match the audio input mode: • OPT/AUX • Phone (Bluetooth)
⑥	Phone	Press and hold for 4 seconds to enter pairing mode (Phone mode only).
⑦		Press and hold for 2 seconds to enter pairing mode.
⑧	+ / –	- Press or hold to adjust the volume. - Press + and - together to cycle between Normal, Voice, and Bass sound modes.

LED Indicators

No.	Indicator	Meaning
C	Solid white	Current audio input mode is in use
D	Flashing white	Pairing mode
D	Solid white	Connected
E	Solid white	Current sound mode is in use

⚠️Important Note:
•When using your Avantree transmitter with a TV in Optical or HDMI ARC mode, it is essential to set your TV’s Digital Output Audio Format to PCM (Pulse-Code Modulation) to avoid audio issues. Find out more here.