Over-The-Ear Bluetooth Headphones w/Built-in Mic/Micro SD Card Slot, Wireless Headset, w/Wired Mode for PC/Cell Phones/TV, Black Wireless music streaming from any compatible Bluetooth device, Wireless range up to 26 feet Works also as a wired headset via 3.5mm line-in jack (cable included) Built-in microphone allows you to answer phone calls while listening to music. Acts as an independent music player with built-in Micro SD card slot Built-in rechargeable battery, Buttons on side of headphones allow complete music control