Ooma Core VoIP Phone System Includes both an Ooma Hub and an Ooma Scout Free calling to any number in the US All the features you've come to depend on, like caller-ID, call-waiting, and voicemail Voicemail notifications to your email and mobile phone; the flexibility to hear your voicemail and control preferences online in the Ooma Lounge The freedom to talk on your existing corded or cordless phones with no PC or headset required