Jabra Speak2 55 UC, Dark Grey. Device type: Universal, Product colour: Grey, Cable length: 0.8 m. Frequency range: 100 - 20000 Hz. Microphone frequency: 150 - 7000 Hz. Connectivity technology: Wired & Wireless, Interface: USB Type-C, Bluetooth profiles: A2DP, AVRCP, HFP. Power source type: Battery, Battery technology: Lithium-Ion (Li-Ion), Talk time: 12 h