Features:Bluetooth + stereo headset combo + MP3 player + FM radio.Wireless headphone connects to iPhone， Samsung Galaxy's， HTC's or any other device that has Bluetooth capability.Allow you to answer or reject phone calls anytime and anywhere.Supplied with a 3.5mm cable that you can use to connect the headphone to devices without Bluetooth.Support TF/Micro SD memory card.With FM function， can listen to the FM radio.Up to 10 hours playing time， talking time up to 11 hours， and standby time 250 hours.Powered by the lithium battery (can be charged via USB).Good quality and fashionable appearance; adjustable length hinges and very comfortable to wear.Headphone is foldable and easy to carry.A good choice for listening music， watching movie， chatting online etc.Specifications:Specification of Bluetooth:Bluetooth version: V2.1+EDROperation distance: 10mRange of frequency: 2.4 to 2.4835GHZISM bandSensitivity: -85dBSpecification of MP3/FM:Music format: MP3/WMATF card support: 128M-32GB (card is not included)FM frequency response: 87.5-108MHZRechargeable lithium battery: 350mAhSpecification of Headphone:Color: Red/Black/WhiteType: Stereo headphone with MicSpeaker diameter: 40mmSensitivity: 115dB S.P.L at 1KHZImpedance: 32ohmFrequency response: 20HZ-20KHZRated power capability: 100mWMicrophone unit: 4.5mm * 2mm， -58dB+/-3dBPlug type: 3.5mm stereoItem weight: 152g / 5.4ozPackage size: 17.2 * 17.2 * 6.8cm / 6.8 * 6.8 * 2.7inPackage weight: 290g / 10.2ozPackage list:1 * Headset1 * USB Cable1 * Audio Cable1 * User Manual