Bose QuietComfort 45 Noise-Canceling Wireless Over-Ear Headphones (White Smoke) - Manual (Page 30)

HEADPHONE STATUS
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CHARGING STATUS
Shows the charging status.
LIGHT ACTIVITY SYSTEM STATE
Blinks white 2 times Charging begins
Solid amber Charging
Solid white Full charge
UPDATE AND ERROR STATUS
Shows the update or error status.
LIGHT ACTIVITY SYSTEM STATE
Fast blinking white (10 seconds) Updating software (via USB)
Slow blinking white (30 to 60 seconds) Updating software (wirelessly)
Blinking amber and white Error - contact Bose customer service