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Important safety instructions
HD 450BT | 3
Notes on data collection and processing and on firmware updates
This product stores individual settings such as the volume and the
Bluetooth addresses of paired devices. This data is required for the
operation of the product and is not transferred to Sennheiser or com-
panies commissioned by Sennheiser and is not processed.
Using the “Sennheiser Smart Control” app, you can update the firm-
ware of the product for free via an Internet connection. If the device
on which the app is installed is connected to the Internet, the follow-
ing data is automatically transferred to and processed by Sennheiser
servers in order to provide and transfer suitable firmware updates:
MAC address, Bluetooth Low Energy UUID, Bluetooth name of the
product, firmware version of the product and version of the app. The
data will only be used as specified and will not be stored perma-
nently.
If you do not want this data to be transferred and processed, do not
connect to the Internet.
Only use rechargeable batteries and chargers
recommended by Sennheiser.
Only charge the product / rechargeable batteries at
ambient temperatures between +10 °C to +40 °C/50 °F
to 104 °F.
Do not heat the product / rechargeable batteries above
+70 °C/140 °F. Avoid exposure to sunlight and do not
throw the product / rechargeable batteries into fire.
When not using the product / rechargeable batteries for
extended periods of time, charge them regularly (about
every three months).
Switch rechargeable battery-powered products off after
use.
Dispose of defective products with built-in rechargeable
batteries at special collection points or return them to
your specialist dealer.
3


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