SoundBot&reg; SB271 Stereo Bluetooth 4.1 (Latest Version) Wireless Headphone for Music Streaming & Hands-Free Calling w/ 12Hrs Talk Time, 250Hrs Standby Time, Built-in Mic, Noise Reduction Ear-cup (BLACK) Feather-weight (2.9oz) and flex headband design with adjustable hidden arm mechanism provides maximum comfort, mobility, and flexibility up to 7.5 inches in height. High-performance long lasting battery performance for up to 11 hours of music playback time via wireless streaming and 250 hours of standby time from 33 feet away with free line of sight. Universal compatible Bluetooth v4.1+EDR supports Bluetooth A2DP, AVRCP, HS/HF profiles, and backward compatible to Bluetooth 1.0, 2.0, 3.0, and 4.0. Pairs with all A2DP-enabled devices including smartphones, tablets, iPhone, iPad, Samsung Galaxy, laptops, PC, digital media players, etc Vibrant color, sleek, fashionable, and stylish light weight one button design with echo/noise reduction ear-cup to screen out noise level. Features premium loudspeaker, built-in microphone for hands-free calling, and MicroUSB charging port. (MicroUSB Cable included)