AT&T SynJ SB67108 Cordless Expansion Handset for the AT&T SynJ SB67138 & SB67158 Small Business Phone System

Expand your SynJ® phone system by adding another handset. Handsets feature access to push-to-talk intercom, paging, call transfer and three-way conferencing. Built-in speakerphone allows handsfree use. Compatible with most headsets (via 2.5mm jack) and hearing aids.
DECT 6.0 Zero Blind Slot Digital Technology
1 to 4 Line Capability
Push-to-Talk Intercom—From Base to Handset and From Hanset to Handset
Expandable System (use up to 10 cordless handsets through a single phone jack)
30 name and number Caller ID history. 100 name/number private phonebook directory
DSL Subscribers may need to us a DSL Filter
For optimal performance batteries should be charged for 16 hours prior to use