Hi - The VTech CS5119 is expandable up to 5 handsets. The compatible cordless handset is the model CS5109. Expansion handsets are registered wirelessly to the base and does not require connection to a telephone wall jack. For more details, please contact our Consumer Sales and Service Center between the hours of 9:00 AM and 3:00 PM Monday through Friday at 1-800-595-9511.
Thank you,
-VTech Support
2 years, 10 months ago
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Posted by:
VTech Baby Monitors Team