Denon AH-W200 Globe Cruiser In-Ear Wireless Headphones Wireless with CD Sound Quality for Premium, CD Quality Audio over Bluetooth 3.0 (Bluetooth with aptX). Integrated Amplifier. Rechargeable Battery provides up to 5 hours of listening enjoyment (charging cord included). Flexible Neckband, Articulating In-Ear Design provides exceptional fit. Comply TX-400M Foam ear tips & Silicon Ear tips (XS, S, M, L) provide noise isolation and superior fit. Bluetooth 3.0 Wireless Connectivity, Integrated controls & microphone for superior mobility, ease of use, and convenience. Denon Travel Smartphone Application for productivity on the go. Cable & Airline Adapter Included for in-flight use.