Oblanc U.F.O. Bluetooth v2.1 Headphones with Built-in Microphone: * CSR Bluetooth v2.1+EDR * Profiles include A2DP, AVRCP * Rechargeable 450mAh battery (up to 10 hours per charge) * Wireless Signal Range Up To: 10m * Extreme comfort and fit leatherette ear cups * 50mm, 32-ohm Neodymium driver in each ear cup * Buttons: On/Off multi-function * Volume Up/Previous track * Volume Down/Next track * Acoustic Design: Dynamic, closed-back * Frequency Response: 20-20KHz * Stand-by Time: 1 week * Color: Green