The AT&T SB67138 + (2) SB67148 four-line corded base and cordless system offers expandability up to 10 handsets and features DECT 6.0 Zero Blind Slot Digital technology. This technology strengthens the radio signal in areas that normally have a weak signal to the base unit. Each extension handset provides individual voicemail , line status, and message waiting indication.Mobile employees have easy access to push to talk, paging, call transfer and 3-way conferencing, You can choose between standard speakerphone or headset operation. The repeaters extend the range between handset and base by 900 meters.SB67138 + (2) SB67148 Features:New DECT 6.0 Technology1.9GHz Corded / Cordless Phone Combo4-Line OperationCaller ID / Call WaitingExpandable Up To 10 Handsets100 Minute Digital Answering SystemAutomated Attendant- Time and Day Stamp- Call Screening / InterceptHandset Message Access- Remote Access- Memo RecordingVoice MenuLarge Backlit LCD DisplayDual Speakerphone (Base & Handset)Lighted Keypad50 Station Name / Number Caller ID Memory100 Station Phone Directory / Dialer3-Way ConferencingMusic On Hold CompatibleNew Call Indicator10 Station Speed DialVoicemail Waiting IndicatorSpeakerphone Volume ControlSelectable RingtonesHandset / Ringer Volume ControlHandset to Base / Handset IntercomCall TransferPageChain DialLast 10 Number RedialHoldMuteLine In Use Indicator2.5mm Headset JackBilingual Menu Support (English / Spanish)

• 4-Line Operation
• Expandable Up To 10 Handsets
• 100 Minute Digital Answering System
• Large Backlit LCD Display
• 3-Way Conferencing
• 10 Station Speed Dial
• Dual Speakerphone (Base & Handset)
• Call Transfer