Yamaha RM-WCH-8 Owner's Manual page 19

Information for users on collection and disposal of old equipment:
This symbol on the products, packaging, and/or accompanying
documents means that used electrical and electronic products
should not be mixed with general household waste.
For proper treatment, recovery and recycling of old products,
please take them to applicable collection points, in accordance
with your national legislation.
By disposing of these products correctly, you will help to save
valuable resources and prevent any potential negative effects
on human health and the environment which could otherwise
arise from inappropriate waste handling.
For more information about collection and recycling of old
products, please contact your local municipality, your waste
disposal service or the point of sale where you purchased the
items.
For business users in the European Union:
If you wish to discard electrical and electronic equipment,
please contact your dealer or supplier for further information.
Information on Disposal in other Countries outside the
European Union:
This symbol is only valid in the European Union. If you wish to
discard these items, please contact your local authorities or
dealer and ask for the correct method of disposal.
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RM-WCH-8 Owner's Manual