KOKKIA MarathonS Sport Fitness Buds : Tiny aptX Ver 4.X Bluetooth Stereo Headset, Secure Fit Ear Cushions and Ear Hooks included. Perfect for iPhone 7, iPhone 7 Plus and other Smart Phones. Tiny MarathonS aptX V4.X Bluetooth Stereo Headsets (Ear-Buds) with integrated microphone, perfect companion stereo headset(s) to KOKKIA Tiny i10s aptX (and/or i10 multi-streaming) Bluetooth iPod Transmitter, Bluetooth iPhone / iPad / iPod / Android / Windows Phones, etc CSRs 86XX most advanced Bluetooth Stereo Solution. Multi-point connection to 2 phones for voice. Multi-point stereo music connection to 2 music source devices for music playback. CSRs latest CVC for clear voice communications and wind-noise reduction. One full battery charge: Up to 8 hours continuous music play time, = ~ 4 marathons (fastest marathon runner), = ~ 1 marathon (oldest marathon runner), = ~ &gt;2 weeks of high-intensity 30 minutes/day work-outs. Wirelessly enjoy stereo music and voice calls. Remote controls for music: play/pause, next track and previous track. Phone controls include: answer/reject call, re-dialing last number. Music will automatically pause when answering voice call, and automatically resume after completion of voice call. High fidelity aptX music, with easy volume controls on headset. Louder than other typical Bluetooth ear-bud designs. Designed for comfortable and secure fit for your ultimate enjoyment.