Jabra Speak2 55 MS Teams, Dark Grey. Device type: Universal, Product colour: Black, Cable length: 0.8 m. Frequency range: 100 - 20000 Hz, Impedance: 3 Ω. Microphone frequency: 150 - 7000 Hz. Connectivity technology: Wired & Wireless, Interface: USB Type-C, Bluetooth profiles: A2DP, AVRCP, HFP, SSP. Power source type: Battery, Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 1800 mAh