Yealink W1DL VoIP USB Phone skype calls 2.4GHz WiFi band Large graphic LCD with blue back-light, Reviewable contact list and call history in any language. Caller ID function, 2.4GHz WiFi band, suitable for Europe, Japan and America. 50-meter(160 ft) radio range, Built-in speakerphone in base, ideal for conference call, Auto-selected RF channel for improved voice quality. Noise reduction and digital echo cancellation, Both base and handset ringing for all incoming calls. Base works as charging station for handset, Fashionable look and human design.