Microphone type: 1 x omnidirectional ECMSpeaker: 11 mm dynamic speakerMicrophone frequency range: 100Hz to 8kHzMicrophone sensitivity: -42 dBV/PaSpeaker frequency range: 300Hz to 7kHzPaired devices: Up to 8, connected to two at the same time (MultiUse™)Wearing style: In-ear wearing style (with..