Bluetooth 4.1 Portable Audio Receiver w/ Apt-x 3.5mm Audio Line out by Golzer Aptx coding for full " wired" audio quality over Bluetooth within an impressive dynamic working range Multifunctional buttons for easy access to track control, answer and end calls, volume control Standby time: up to 200 hours, Talk time: up to 6 hours, Music Playing time: up to 6 hours With a built-in microphone, it can be used as a Bluetooth headphone to answer calls when connecting with a earphone Includes: 3.5mm audio cable, Micro USB charging cable