Jabra Speak2 75 UC. Dark Grey. Device type Universal. Product colour Grey. Signal-to-Noise Ratio (SNR) 72 dB. Frequency range 80 - 20000 Hz. Microphone frequency 150 - 14000 Hz. Connectivity technology Wired & Wireless. Interface USB/Bluetooth. Bluetooth profiles A2DP. AVRCP. HFP. HSP. Power source type Battery. Battery technology Lithium-Ion (Li-Ion). Battery capacity 4700 mAh