Levin Bluetooth Headset, High Audio Quality, Amp Up Your Workout! Wireless Bluetooth Improve Life Levin Bluetooth headset is equipped with Bluetooth v4.0 technology, it is perfect for workout, comminute and relax. You can choose mode to enjoy your favorite music or listen to podcasts when you are exercising. When the calls coming, you can choose answer/end/reject it. And the calls manager also support last number redial, voice dial. One Bluetooth headset combine the function of phone calls and MP3 player, makes life simple without cables tangle. Why Choose Levin? -Levin Bluetooth headset upgrade with the feature of TF card playing, you can take calls and switch FM radio & TF card playing (Max.16GB) with a quick tap of your headset. -Levin Bluetooth headset built in world class Bluetooth technology, gives you crisp and clear audio so wherever you go for workout, you'll never miss a beat.  -Ergonomic neckband for security and comfort fit during workouts. Technical Data Bluetooth Frequency range: 2.4026-2.480GHz FM Radio: 87.5-108MHz Magnet type: Neodymium Speaker diameter: 27 mm Rechargeable Battery Type: Polymer Li-ion Product weight: 38 g(1.34 ounce) Product size:139.55cm(5.123.741.97 inch) Package Content 1 Bluetooth Headset 1 USB 2.0 charging cable 1 User's Manual