Bluetooth Wireless Headphone, BENTOBEN Sport Headsets Wireless 4.0 Earphones Built-in Mic & AUX Sweatproof Fit for Gym Running/Sports Up to 15h Works with iPhone, iPad, Samsung Smartphones, Blue This Bluetooth Wireless Headphone distinguishing from other headphones is that it can be used to play out loudly via the 2W external loudspeaker, sharing is caring after all. Built-in mic for headset functionality with controls for audio and phone calls. (Without Audio Cable) Up to 15 hrs of Music playing time and 300 hrs standby time based on the outstanding built-in rechargeable battery. 3.5mm AUX line-in audio jack supporting you to use it as wired headphones without battery. Lightweight Comfortable Around-ear Fit:90 degree swiveling earcups, soft protein leather earpad and headband material delivers more durability and comfort.