Charge your Lightning-equipped iPhone, iPad, or iPod Touch while listening to wired headphones with the ADVANCED SOUND GROUP Accessport 2. This adapter features a built-in DAC and amplifier to support resolutions up to 24-bit / 48 kHz and headphones with impedances up to 300 ohms. Its onboard buttons allow you to adjust volume, control track playback, and maintain full call functionality. Since it draws power from your mobile device, the Accessport 2 requires no batteries for operation.