... .call out,answer,hang cellphone 3.No MOQ 500m Motorcycle helmet bluetooth intercom headset Features: 1. Wireless headset for bluetooth enable ... . Automatic switching among bluetooth cell phone, intercom, stereo music, FM radio.10.With DSP echo cancellation and noise suppression technology, crystal ... : 40x26x21 cm (10 sets , G.W.: 3.0 KG) Motorcycle helmet bluetooth intercom headset