Jabra Speak2 75 MS Teams - Link 380c, Dark Grey. Device type: Universal, Product colour: Black, Audio formats supported: AAC, CVSD, mSBC, SBC. Frequency range: 80 - 20000 Hz, Impedance: 4 Ω. Microphone frequency: 150 - 14000 Hz. Connectivity technology: Wired & Wireless, Interface: USB/Bluetooth, Bluetooth profiles: A2DP, AVRCP, HFP, HSP, SSP. Power source type: Battery, Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 4700 mAh