CISNO Bluetooth Headset Over the head Boom Mic Wireless Headphone Noise-Canceling Headset for Truck Drivers (S) Noise Canceling: The Noise-canceling function provide you clear voice while in the noise environment. It Focus on driving while wearing this headphone. Long Talking Time And Stand-by Time: This Headset will offer 12 hours-talking time after charging, Also the stand-by time is 250 hours. Paired Easily: This headset can be paired easily with any devices (including iPhone, iPad, Android Cell Phones, etc.) in 32 feet.With multipoint connection,the headset can be connected with two bluetooth (V2.0 & V1.2) devices at the same time. Comfortable: Flexible-handband design makes it easy to carry. Soft and padded ear muff cover makes your ear comfortable while long wearing. Excellent Sound Quality: The headset accurately and faithfully produces sound especially voices.