["The small, lightweight Snom C300 impresses thanks to the powerful 3-watt speaker and the 6 microphones, which use a beamforming microphone array to produce crystal-clear sound in full duplex hands-free operation. The integrated long-lasting battery, which can be recharged via USB, allows up to 24 hours of talk time or 5 days of standby operation and even mobile charging of a smartphone. The Snom C300 can be connected to a variety of devices via both Bluetooth and USB cable. Headphones can also be connected. Operation and configuration is carried out either via 7 function keys (3 audio keys and 4 touch function keys) or your own smartphone app. The operating processes are confirmed via multi-colored LED status displays and an announcement", "Beamforming microphone array", "Full duplex hands-free mode", "Connection via Bluetooth or USB", "5 days standby operation"]