Hi-Fi Speaker System and battery for the iPhone 7 and iPhone 7 Plus

Duo Slim is the latest edition to the Duo family of iPhone charging and speaker cases for the iPhone 7 and iPhone 7 Plus (backwards compatible with the iPhone 6/6s and iPhone 6 Plus/6s Plus). Sign up to get an exclusive pre-order price up to 50% off!


  • Play digital audio directly from the iPhone to the Duo’s hi-fidelity speakers via a docked iPhone Lightning connection
  • Full-range custom-designed slim 3-watt speaker and passive radiator for amazing bass
  • High-resolution DAC (Digital-to-Analog Converter) for improved hi-fidelity audio
  • Use your wired headphones again! The 3.5mm headphone jack is connected to the case’s integrated DAC for an amazing headphone audio experience
  • 80% extra battery life to your iPhone or enjoy 8+ hours of audio playback with the Duo Slim’s integrated 2200mAh battery for the iPhone 7 or 3000mAh battery for the iPhone 7 Plus
  • Simultaneously charge the Duo and attached iPhone via Lightning connector in half the time of other leading battery cases

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