Product Guide - KX-HNM300
How to add additional cameras to a monitor. - Baby Monitor
Up to 3 additional camera units can be registered to the monitor unit. View this answer to learn how to add additional cameras.
How to adjust the sleep mode on the monitor. - Baby Monitor
Sleep mode is used to automatically turn off the display of the monitor unit when the monitor unit has been inactive for a specified period of time. You can select how long the monitor unit is inactive for before it enters sleep mode, or turn off sleep mode.
How to charge the Monitor battery. - Baby Monitor
In this answer we will provide you with the correct steps to charge the battery.
How to install the battery in the monitor. - Baby Monitor
Learn how to remove and replace the battery in the Baby monitor.
This link will provide you with a interactive guide of the Baby Monitor functions.