Yamaha YH-L700A Noise-Canceling Wireless Over-Ear Headphones - Manual (Page 45)

List of indicator displays and audio messages
The indicator displays and audio messages on this product are shown below.
Product indicator display
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Power on
Flashes according to the remaining battery power.
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Flashes red three times: plenty of charge remaining
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Flashes red two times: moderate charge remaining
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Flashes red one time: small amount of charge remaining
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Standby mode for pairing with Bluetooth device
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Flashes (between red and blue alternately)
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Searching for paired Bluetooth device
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Flashes (blue)
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Finished connecting to Bluetooth device
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Lights up for 20 second (blue) and turns off
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Power off
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Lights up for 1 second (Blue) and turns off
Indicator display when charging
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Charging
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Lights up (red)
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Charging completed
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Not lit
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Appendix > List of indicator displays and audio messages