This Bluetooth 3.0 Stereo headset with long-range Bluetooth intercom is designed specifically for outdoor activities. With the SPH10, you can call handsfree on your Bluetooth mobile phone, listen to stereo music or voice instructions of GPS navigations by Bluetooth wirelessly, and have intercom conversations in full duplex with your companions. Thanks to the latest Bluetooth 3.0 and the advanced digital signal processing technology, the SPH10 offers the best sound quality for both incoming and outgoing sound in its class. This system will allow you to bring crane operators and other on-site personnel into the conversation.