Hello, welcome to our store.,100% brand new and high quality,Product Type: Bluetooth Cap,Function: support music, Use: headset,Bluetooth protocol: 4.1,Transmission distance: CLASS II,Operating range: 10 meters,Battery capacity: 180MAH,Frequency range: 20-20KHZ,Sensitivity: 95DB,Impedance: 32 ohms,Speaker size: 32MM,Charging time: 2H,Voice continuous talk time: 4-6H,Bluetooth music playback time: 3-6H (70% of the volume state),Color: as shown,Size:32*23*6CM,About the Size: Please check the detail size and choose the right size. Please allow 1-2 cm obtained from manual measurement, thanks,Note: As different monitors display colors differently, the color of the actual item may vary slightly from the above images, thanks for your understanding.