Konftel 55Wx Wireless Bluetooth HD Audio Conference Speaker Phone CONNECTIVITYvia Bluetooth, USB,desk phone (via optional adapter), mobile phone cable connection (via optional cable adapters) HD audio speakerphone with OmniSound Supports optional wired expansion microphones Rechargeable battery with up to 9 hours talk time Additional features: Records calls on SD and SDHC memory card (not included), color touch screen, Two-year warranty