PERI Duo for iPhone 6/6s - Black (Not for 6 Plus Models) Experience a new way to take your music everywhere - the Duo is the first iPhone case to combine a hi-fidelity speaker with 10x the volume of your iPhone and extra battery into a single sleek case. Get 120% more life from your iPhone, with the 2900 mAh battery  that's 60 hours of music, 13 hours of HD video or 16 hours of talk time! Stream music wirelessly via Bluetooth or Wi-Fi. Use Duo's on-board Wi-Fi audio router to stream high-resolution, lossless audio files with 100% clarity. Or Connect up to 64 Duo devices over Wi-Fi with PERIs Quick Link technology! Save and Play your favorite Spotify playlist from the cloud with PERIs Quick Play one-button streaming while the Duo is detached and connected to your home Wi-Fi. Use the Duo as a speaker phone with its integrated microphone and amplify the volume on those hard-to-hear calls and group conference calls. Works only with the iPhone 6/6s not the iPhone 6 Plus/6s Plus.