UGREEN CM668 User Manual page 16

Indicators
Function
Power on
Bluetooth
connection
Bluetooth Call & Chat
(Use the built-in
microphone in
Bluetooth earphones)
Audio Codecs
Indicator
Power on
Pairing
Pairing
successful
Reconnecting
On
Off
Using
SBC
aptX
aptX Adaptive
aptX HD
-15-
Blue indicator will be
on for 1s
Blue and red indicator
flashes alternately
White/blue indicator
flashes once per 10s
Blue indicator flashes
once per 5s
White indicator flashes
once per 10s
Blue indicator flashes
once per 10s
Solid red
Solid blue
Solid yellow
Solid green
Solid purple