DECT 6.0 Digital technology</br>Caller ID/Call Waiting*-stores 50 calls</br>Push-to-Talk</br>HD Audio</br>Handset speakerphone</br>DSL Subscribers may need to us a DSL Filter</br>For optimal performance batteries should be charged for 16 hours prior to use(Refer page 85 of user manual attached for charging instructions)</br></br>Product Description</br></br>VTech DECT 6.0 Digital Two Handset Cordless Answering System with Cordless Headset</br><br/>http://www.amazon.com/gp/product/B004OA731Q