Kaiser Baas KBA10004 Getting Started Manual - page 6
Manual is about: Bluetooth
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BeforeyoucanuseyourBluetoothHeadphones,werecommendtochargetheLithiumbattery.
UsethesuppliedUSBcabletoconnecttheBluetoothHeadphonestoyourcomputertocharge.
Afullchargewilltakeuptofour(4)hours.TheredLEDindicatesthatthebatteryischargingandwill
turn off when it is fully charged.
Whenthebatteryisrunninglow(duringuse),youwillcontinuallyhearfour(4)indicator tones.
Connect the Bluetooth Headphones to your computer to recharge.
Charging your Bluetooth Headphones