This CleverTEC™ Sport wireless headset with a built-in microphone pairs easily with any Bluetooth device. The high-quality headset is rechargeable and includes a USB cord for easy charging. These noise-reducing headphones allow you to listen to music or audio books and the built-in microphone lets you easily answer calls while you're on-the-go. The simple 3-button design makes it easy to answer calls, adjust the volume, and pause or skip songs. Works up to 6 hours on single charge. Plastic and electronics. 5" x 5". Adjusts to fit most.