1.Size:About 9.0 x 4.7 x 1.5 cm2.The cable length: 100cm3.Bluetooth version: 3.0 + EDR4.Output mode: Bluetooth 6.Input voltage: 3.7V7.With built-in 500mA lithium battery8.Supported standard: HSP HFP9.The power of headset: 2W10.The Power of this item: 8W11.Working temperature: -60-100℃12.Frequency band: 60 Hz-20 KHz13.The sensitivity of Microphone: 80db±2db14.The power of loudspeaker: 2W15.The resistance of loudspeaker: 4ω16.Compatible models:iPhone， Samsung， HTC， Sony， Nokia， BlackBerry， etc. supportall of Bluetooth enabled mobile devices (phone， tablet) Note:the cellphone is not inclueded.Package include1 x Bluetooth Car kit1 x Car Charger1 x USB Charge Cable1 x User Manual