Features: Morul U2 Bluetooth4.1 Sport Headphone with fashion design, it's difference and unique. Blutooth 4.1 wireless connecting, Excessive freedom to enjoy music Special designed shape earphoner,anti-shedding design for sport Half in ear structure design, music and comfort with you. 11mm Neodymium magnet with high magnetic bio-grade. IPX7 Waterproof Specifications: General Specification Brand Morul Model U2 Color Metal silver and black Wearing Type Half In Ear Product Weight (g) 19.2 Dimensions (mm) 20*20*17 Technical Parameters Connectivity Bluetooth Charging time 1-2 hours Using time 6-8 hours Receive Sensitivity 109 dB Noise Reduction CVC6.0 Distortion Rate 1% Impedance 16 Ω Frequency Response 20Hz-20KHz Bluetooth Version 4.1 Bluetooth Protocol A2DP, HFP,HSP Waterproof level IPX7 Package Included: 1X Morul U2 Sport Headphone