Features Enjoy your music with 2 speakers. Answer your calls with the Voice Answer function. Connect your two phones simultaneously. Listen and follow the instructions of your smartphone navigator. 100% compatible with all Bluetooth mobile phones and smartphones. Intuitive: only one control button integrated into the microphone. Bluetooth V.4.0 HQ sound and noise reduction technology. HF 2.0 Dual can be paired with HF3/D3 or most other INTERCOM Bluetooth devices as slave devices. HF 2.0 DUAL is 100% compatible with all Bluetooth mobile phones, smartphones and audio devices. Very easy to install, no tools are required. Bluetooth® Specification v4.0 Class 2. Bluetooth® profiles: HSP v1.2, HFP v1.6, EDR, A2DP v1.2, AVRCP v1.4, DI v1.3. Up to 10 meter range. Foam covers with Velcro fastener. One-button multifunction control. Microphone with noise-canceling technology Technology Polymer lithium battery 110 mAh. Standby time:> 60h. Charging time: 2 h. Talk time:> 7h. Total weight: 35 gr. Operating frequency: 2.4 GHz Power supply: DC 5.0 V 500 mA Description Bluetooth® system is fully integrated into the inside of the helmet. 2 speakers. Listen to high-quality music and follow the sound GPS instructions. Microphone built-in micro-USB port. Ready to connect with Bluetooth® enables mobile phones. Advanced multipoint connection. Connect to 2 smartphones simultaneously. Dual Link function: in addition to the phone function, you can add another one at the same time Sound emitting Bluetooth® device. All electronics are integrated into the speaker housing. Intuitive button on the microphone. Red / blue LED status indicator on the microphone. Hands-free talking with the Voice Answer function. Very easy to install.