Audio Headset bandwidth Wideband Speaker bandwidth Music mode Wideband Speaker bandwidth Speak mode Wideband Microphone bandwidth Wideband Certifications Regulatory Approvals: CE FCC KCC RCM UL  Industrial Certifications: Microsoft Teams Avaya Cisco Connectivity AC power supply USB power supply by PC Bluetooth device No Connection (mini jack USB etc) USB Cord length Control cable: 95cm HS cable: 120cm