Single Use&2 smartphones conncetion motorcycle headset adopts technology, which effectively reduces disconnection and noise caused by interference in the 2.4GHz frequency band. not only supports intelligent noise cancellation and voice assistant, it can also simultaneously connect two smartphones and meet different needs such as navigation/calling/listening to music at the same time.(Note: This product does not have the intercom function).One-click to wake up voice assistanthas an intelligent voice assistant system. You can simply press the voice control button on the helmet headset and easily wake up your voice assistant or Siri to take actions without taking your attention off the road. It also allows hands-free auto answer calls, making your ride safer and more convenient. Large buttons allow you to control these functions with a simple operation.1000mAh large battery & Type-C chargingBuilt-in an 1000mAh battery, Moman H4 Plus supports 32 hour continuous working and 360 hour stand-by on a single charge. You could have audio, data transfer and charging via one Type-C port on intercom, avoiding messy cables connection.IPX6 waterproof & Dustfree motorcycle headset system features IPX6 waterproof for dealing with harsh weather conditions such as dust, rain, storm, snow and low temperature. Scientific design makes it perfectly adapt to most open face, modular and full-face style helmets.40mm graphene vibrating unitThe unique construction of the 40mm graphene diaphragm ensures the excellent sound quality for music and callsHi-Fi Stereo. The microphone's dual noise cancellation and windproof sponge allow for clearer calls.