Noise cancelling microphone equipped with technology allows clear conversations in all conditions. Bluetooth module for a higher quality talk time hands-free with external microphone. Playback music via Bluetooth with A2DP protocol. Bluetooth version: V4.1 + EDR. Supported profiles: HSP V 1.2 - HFP V 1.6 - A2DP v1.3 Range: 10m Operating temperature: 0 - 50 °C. Dimensions: 120mm x 100mm x 36mm Weight: control panel 40 g. Control box 255 g.