The Sena SPH10 is a versatile, portable outdoor Bluetooth headset and intercom. It is extremely easy to operate using the multifunctional jog dial and offers a range of up to 900 meters for up to 4 participants. Sena's outdoor Bluetooth headset and intercom stands out particularly due to its unique operation with the jog dial. This hemispherical push-and-rotate knob makes it a breeze to use even with thick gloves. Thanks to the impressive range of up to 900 meters, the Sena SPH10 allows a group of up to 4 participants to stay connected via Bluetooth at all times, whether on a large construction site, in challenging terrain, on large ships, or in the city. Both hands remain free while communication is ensured. For those who don’t want to miss their favorite music during outdoor activities, simply pair their smartphone, iPhone, iPod, or MP3 player with the SPH10 via Bluetooth and enjoy their favorite tunes. With the SPH10, making or receiving calls via mobile phone is convenient and can be done without having to hold the phone. Accepting calls is easily done through the SPH10.