August EPA30 Bluetooth Headphone Cable Knit Hat - Ideal for Gadget Lovers (Beige) Bluetooth Hat - Keep warm while listening to music from smartphones and tablets Audio, Volume and Call control Buttons - Answer calls & control your music Built-in Microphone - Stay connected to your phone with hands free calling Internal Li Ion Battery - Rechargeable battery gives over 2 hours between charges Quality wool - Warm your ears with your coolest tunes