Ecsem Wireless Stereo Headset Sport Bluetooth Handsfree Music/Voice-Dial Earbud headset for Phones Advanced built-in microphone, Support A2DP, AVRCP, Headset, Headfree, Noise-Canceling, Voice-Dial/Mute. Up to 6 hours of talk time and 5 days of standby time. Neckband Sport design, stunning and compact, secure & comfortable to wear. Play/pause (also answer calls), Vol +/-, and next/previous track buttons, super easy operation, good workmanship,BQB Certificated. Noise reduction and echo suppression technology, sound quality is still excellent under any noisy environment.