TCL Alto 8 Plus Quick Start Manual page 170

3a
Overview
Sound Bar main unit
Source button:
Press to switch the audio source
among HDMI ARC/HDMI IN/
/BT/USB modes.
Power button: Bluetooth button:
Press to enter Press to select the Bluetooth source.
STANDBY mode. Press and hold to enter pairing mode.
HE LL O
HELLO
LED light:
Screen display:
Indicates the keep lighting up, which
Sound Bar Indicates the Sound Bar
status.
is in stanby mode.
Volume buttons:
Press to increase
OPT
or decrease the
volume level.