Hellberg Xstream Bluetooth Ear Protection Hearing protection with Bluetooth for music streaming. Xstream connects via Bluetooth to your phone for wireless music streaming and phone calls. Your hearing is protected while you enjoy your favourite music with excellent sound quality, and the built-in speech microphone allows you to make phone calls. A boom-microphone is available as an accessory for those who need clearer speech quality in high noise. Music streaming with excellent sound quality Easy to operate with push buttons Comfortable headband with soft padding Approval Info CSA Class: A ANSI approval: ANSI S-3.19-1974 CSA approval: CSA Z94.2-02 Environmental approvals: ROHS, REACH, WEEE SNR: 29 NNR: 25 HML: 32-26-17 EN standards approval: EN352-1, 6, 8 Technical data Operation temperature: -20C / +55C Battery type: Li-Ion Bluetooth version: 4.1, A2DP 1.2, HSP 1.1, HFP 1.6 Run-time: 50 hours Stand-by time: 100 hours Charging time: 3 hours Weight: 386 g