AECO Business Type Stereo Bluetooth 4.0 Headset with General HD voice & low noise GENUINE AECO PRODUCTS ,Don't buy fakes from unauthorized sellers. Good Voice Quality: The combination of original composite drive unit and Bluetooth 4.0 chip creating stable conversation effect and crystal clear sound quality. Voice command: Just say a word to answer incoming call. You just say "YES" or "NO" to decide whether you will answer the call. You will drive safety and won't miss any call by wearing AECO. (This function support English version only) Bluetooth V4.0:With the application of Bluetooth 4.0 Low-Energy technology, Bluedio DF630+ can achieve more than 400 hours (more than 15days) of Standby time. Multipoint pairing: AECO supports to connect with 2 mobile phones at the same time, it is easy to answer, reject, convert or keep your call if there is another incoming call for second mobile phone while you are in conversation.