°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.
Notes on the ingress protection rating of the earphones
The earphones feature an IPX4 ingress protection rating which means they are protected from the
ingress of water (protection class according to International Protection Marking (IP code), IEC standard
60529, tested under laboratory conditions).
The earbuds can be used in the rain, for example. However, they are not suitable for immersion in
water or for wearing in the shower. In case of permanent moisture/wetness, the ingress protection can
be reduced and the product can be damaged.
Do not charge wet earbuds. Completely dry wet earbuds with a dry cloth before charging them.
The charging case is not splash waterproof. Always keep the charging case dry.
Notes on data collection and processing and on firmware updates
This product stores individual settings such as the volume, the sound profiles and the Bluetooth
connection data of paired devices.
This data is required for the operation of the product and is not transferred to Sennheiser or
companies commissioned by Sennheiser and is not processed.
Using the “Sennheiser Smart Control” app, you can update the firmware of the product for free via an
Internet connection. If the device on which the app is installed is connected to the Internet, the
following data is automatically transferred to and processed by Sennheiser servers in order to provide
and transfer suitable firmware updates: hardware identifier, hardware revision number, firmware
version of the product, operating system type (Android, iOS) and version, version of the app. The data
will only be used as specified and will not be stored permanently.
If you do not want this data to be transferred and processed, do not connect to the Internet.
Intended use/Liability
These headphones have been designed as an accessory for Bluetooth compliant devices. They are
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