Price Precise Comfortable Fit Best China Promotion HeadsetModel:STN-19PRODUCT DEscriptION:Bluetooth version: V3.1 or 4.0+EDROperation distance: 10mBluetooth frequency range: 2.4-2.4835GHz ISM bandBluetooth sensitivity: -85dBMusic format: MP3/WMATF card support: 128M-32GB (card is not included)FM frequency response: 87.5-108MHzRechargeable battery: 550mAhSpeaker: Diameter 40mmHeadphone sensitivity: 115dB S.P.L at 1KHzImpedance: 32ohmFrequency response: 20HZ-20KHZRated power: 40mWPower capability: 100mWMicrophone unit: 4.5 * 2mm -58dB+/-3dBPlug type: 3.5mm stereoCharging time: Approx. 3-5hoursFeatures:Bluetooth + stereo headset combo + MP3 player + FM radio.Wireless Bluetooth headset,Website:http://www.smartcoolproduct.com, compatible with Bluetooth enabled devices, such as for iPhone, iPad, HTC, Lenovo, Samsung, Tablet PC, etc.Enhanced noise reduction, good choice for listening music, watching movie, answering phone calls, etc.Support TF/Micro SD memory card.With FM function, can listen to the FM radio.Supplied with a 3.5mm cable that you can use to connect the headphone to devices without Bluetooth.Multifunctional keys allow you to power on/off, answer/hang up/reject/redial call, pause and play, vol+/-, next/previous track.EQ mode can be changed by short press FM/MP3 button (EQ mode includes Natural/Pop/Rock/Jazz/Classic/Country/Heave bass), bring you vivid sound field, sound clarity and enjoy different styles of music.Powered by the lithium battery (can be charged via USB).Good quality and fashionable appearance; adjustable length hinges and very comfortable to wearMaterials:1.Headband: PP plastic+PU2.Headphone/earphone shell: ABS3.earmuff: sponge,+PU4.Surface solution: normal/UV coating/rubber paint5.logo printing: silk printing, laser etching,water transfer printing,heat tranfer printing,color printing6.Test :Lead cadmium <100 ppm Non -6p Warranty Details:Certificates: CE,ROHS,FCTransmission distance: 10mCharging Interface: Micro USBIP Grade: IP67