Motorcycle Helmet Headphone 13024

1.Directly talk via bluetooth,working as interphone,500m available 2.Real two-way wireless communication between three riders by Bluetooth system 3.Receive and reject phone call,call out and hang up 4.Auto answer phone call 5.Listen music wirelessly from bluetooth music device 6.Could be onnected with GPS 7.Freely switch between Phone call,Bluetooth Intercom,Music 8.Support 3 people talking at the same time 9.DSP Noisy supression technology and Mic echo cancellation to ensure high quality sound even in high speed 10.Up to 120Km working speed 11.Up to 7 hours talking time