The SPH10 is a Bluetooth Stereo Headset with long-range Bluetooth Intercom designed specifically for outdoor sports activities. With the SPH10, you can call hands-free on your Bluetooth mobile phone, listen to stereo music or voice instructions of GPS navigations by Bluetooth wireless, and have intercom conversations in full duplex with your companions. Thanks to the latest Bluetooth and the advanced digital processing technology, the SPH10 offers the best sound quality for both incoming and outgoing sound in its class. Also, the easy-to-access and intuitive button operations make the SPH10 a perfect companion for outdoor sports.