Logitech K400 Plus - Logitech Unifying Wireless Technology; Replace Batteries

LOGITECH UNIFYING WIRELESS TECHNOLOGY
Unifying wireless lets you add up to six Unifying ready devices to one tiny receiver.
Learn more about Unifying
REPLACE BATTERIES
K400 Plus is a plug and play keyboard designed for easy use and long life. However, if
you encounter any issues or have questions about your product, Logitech is here to
help.