Noise Reduction?? Repeater Compatible?? Smart Wall Mount?? 2 Answering Machines??Music on Hold?? Power Back-up Operation?? Key Detector</br>Sleek Design</br>3-way Conferencing with Speakers in Base and Handsets</br>Link2Cell Bluetooth Enabled</br>Sync Smartphone to Home Phone?? No Landline Required??Link up to Two Smartphones to Make and Receive Cell Calls with Lin