Mixcder M01 Bluetooth Stereo Headphones Sports Headphones Wireless Headset with Build-in Microphones Listen to media without distraction of wire from your phone or tabletUltra lightweight (0.6oz / 17.2g) and ideal for use on the goBuilt-in microphone and controls for phone calls, volume, and music playbackThe material of the headset is in a sweat and water proof designLong play time up to 5 hours, standby time up to 120 hours Mixcder S02 Freedom for sports, enjoyment for audio. Immerse yourself by wireless audio freedom and clear sound with the Mixcder S02 Bluetooth headsets ● Noise isolating design with rich and clear sound ● Comfortable, lightweight and secure fit ●