Connect it to your landline for standard conferencing
Connect to your iOS/Android or cell phone or tablet via the 3.5mm jack
Functions include call mute, call hold, three-way calling in all modes, PSTN direct dial, redial, rapid dial, recall and second flash.
Make Skype conference calls using your PC/Mac via USB for VoIP functionality
You can even add external mics, a power amplifier or mixing console via the auxiliary audio ports