Konftel 300 conference phoneEquipped with OmniSound 2.0 for a more powerful sound than ever beforeUSB Connection for VoIP callsLine mode selector helps combine and switch easily between connection methods: analog, USB, mobile (GSM/cordless phones)Conference guide simplifies multi-party callsRecord and listen to your meetings with an SD memory cardOptional expansion microphone connection for wider receptionOptional connection for wireless headset or PA systemFuture-proof; can be upgraded with smart functionsTwo year manufacturer"s warrantySwitch and combine connections: analog, VoIP, cellular and wireless (via cable)Upgradeable for large roomsKO840101059