Beats BeatsX Series Wireless In-Ear Neckband Headphones - BlackThe Official Beats by Dr. Dre, BeatsX Series Wireless In Ear Neckband Headphones. Black version. Model: (MTH52LL A). Universally compatible with most Bluetooth smart devices. Features: Connect via Class 1 Bluetooth with your device for wireless listening. Up to 8 hours of battery life for when youre on the go. With Fast Fuel, a 5 minute charge gives you 2 hours of playback when battery is low. Variety of eartip options offer personalized comfort. Flex