Panasonic KX-TCM417-B Operating Instructions Manual page 3

For Best Performance
Battery Charge
A rechargeable Ni-Cd battery
powers the handset. Charge the
battery for about 3 hours before The battery
initial use (p. 10). is beneath
Operating Distance/Noise
Calls are transmitted between the base unit and the handset using
wireless radio waves. For maximum distance and noise free
operation, the recommended base unit location is:
Away from electrical appliances In a HIGH and CENTRAL
such as a TV, radio, or personal location with no obstructions
computer. such as walls.