Description:This is a headset designed for long battery life.The L9 has a built-in 300mAh high-capacity battery for higher density, greater security and longer charging cycle.Built-in Bluetooth 4.1+EDR chip, strong performance, low power design, stronger signal.High-definition CVC noise reduction processing effectively filters out noise and makes people's voice clearer.Four colors are available for you to choose from, and there is always one that fits your needs.Specifications:specification:Type: ear-hookCommunication: WirelessAgent: USBWireless type: BluetoothVocal principle: dynamicControl button: yesVolume control: yesActive noise reduction: noFunction: ordinary headphones, mobile phones, sportsPlug type: wirelessSensitivity: 123 decibelsFrequency response: 20-2000HzLine length: 1.0 MTResistance level: 9Waterproof: NoModel: L9Support memory card: noSupport APP: NoWireless: yesWith microphone: yesColor: black, rose gold, gold, whiteModel: L9Call time: about 36 hoursMusic time: about 32 hoursStyle: ear hookConnection method: wirelessType: BluetoothPackage Included:1* headphone1* pair of headphones1* charging cable2* ear hook2* ear capNotes:Note:**Size for manual measurement, a little error is normalthere may be 2-3 cm deviations**And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!