Syllable D700-2017 Bluetooth 4.0 Sport Wireless Stereo Earphones 2.4GHz In-ear Headsets With Mic - Blue. Output Power: 5V+/-0.25V Frequency Response: (2402MHZ~2480MHZ)+/-100KHZ Sensitivity: -42±3dB Impedance: 30ohms Battery Time: 62 mAh Features: Ergonomic design, high quality materials ensuring the headset comfortable for daily use Electrical Outlet Plug Type: USA plug
