Parameter:Product model: V9Headset type: Bluetooth headsetCharging time: 1-2 hoursBattery capacity: 110mAhColor: business blackEarphone listening to music: 2-3 hoursTransmission range: 10 metersCharging port: Micro USBFrequency range: 20-20kHZLanguage version: support Chinese and English switchingSupport protocol: HFP, HSP, A2DP, AVRCPFeature:1.quipped with withluetooth chip to guarantee the sound quality and the highest fidelity of the headset.2. portable storage box, easy to carry and good protection.3. Ultra light and comfortable design, ergonomic earplugs and earrings, even if worn for a long time, it will not bring heavy feeling. The 180-degree swivel arm can adjust the angle and install the headset on the right or left ear.4. compatible with traditional smart phones such as iphone, samsung, huawei, lg, htc, android, etc.,Package Contents:1 * Single ear bluetooth headset1 * USB charging1 * user manual