Syllable G600 Wireless Bluetooth 4.0 Headphone Earphone Deep Bass Built-in Mic / 40mm Speaker - Black + Red. Battery: 3V~4.2V Compatibility: Supports wired mode, the battery is depleted also continue to play music through the audio cable. Dimensions: 180 x 185 x 75mmc Weight: 190 g Parts: 6 months Labor: seller Electrical Outlet Plug Type: USA plug