Overview:This AT-BT808 headphone features excellent sound quality， built-in microphone， adjustable length hinges， soft earmuffs， luxury appearance， and foldable design. It is compatible with most Bluetooth enabled devices， such as for iPad， iPhone， Samsung， Blackberry， HTC， Nokia， LG， Motorola， etc. It also supplies with a 3.5mm cable that you can use to connect the headphone to devices without Bluetooth. It is a good choice for listening to music， watching movie， chatting online， etc.Features:Bluetooth + stereo headset combo + MP3 player + FM radio.Perfect for iPhone， Samsung Galaxy's， HTC's or any other device that has Bluetooth capability.Built-in microphones for clear conversations， allow you to answer/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 6 hours， and standby time 250 hours.Powered by the lithium battery (can be charged via USB).Adjustable length hinges and soft earmuffs for comfortable wearing.Foldable design for easy carrying and storage.Specification:Bluetooth version: V2.1+EDRBluetooth protocol: Hsp/Hfp/A2dp/AvrcpOutput power: Class IIOperating distance: 10m / 32.81ftOperating frequency: 2.4 to 2.4835GHZInput voltage: DC5V Working time: 10 hoursTalk time: 6 hoursStandby time: 250 hoursCharging time: Approx. 2.5 hoursPlug type: 3.5mm stereoColor: Blue/Black/WhiteAudio cable length: Approx. 1.2m / 3.94ftHeadphone size: Approx. 18.5 * 8.5 * 19cm / 7.3 * 3.3 * 7.5inHeadphone weight: 213g / 7.5oz