This document is the installation manual for the Panasonic cordless telephone, describing the steps to register and use the handset. This handset is an accessory for use with Panasonic base units KX-TG5561, KX-TG5566, KX-TG5571, KX-TG5576, and KX-TG5583. The handset needs to be registered with the base unit before use. Please refer to the operating instructions of the base unit for more details. The battery needs to be charged for 6 hours before initial use.