Lightning to USB-C is the only cable included as pictured that comes with the DAC3. Output is 3.5mm unbalanced. Shipping is via USPS 1st Class. Serious offers are welcomed!! No returns please, clearing out electronics that do not see enough usage. SPECIFICATIONS: DAC typeUSB InputUSB audio D/A converterESS ES9281A PRO USB transfer modeAsynchronous dual clock USB controllerTI1020B USB device classType 1.1 or above Input bit depth32 bit Input sample rate44.1kHz-96kHz native playback188.2kHz & 192kHz re-sampled to 96kHz OutputAnalog 3.5mm mini-jack stereo Full-scale output level2.0V RMS Output impedance2 ohms Recommended headphone impedance range12 ohms to 10K ohms Headphone amplifierLME49726 Frequency response10Hz-25KHz (+/- 0.5dB) SNR>116dB THD+N(1kHz FS 96kS/s) <0.002% Crosstalk-110dB Power requirementUSB 5V DC, 200mA USB power filtering2-stage redundant regulation Product dimensions 1.9” (48mm) ×0.6” (15mm) ×0.375? (10MM) Shipping weight1.0lbs (0.5kg) EnvironmentalOperating Temperature: 32 to 95 degrees FNon-operating Temp: -4 to 113 degrees FRelative Humidity: 5% to 95% non-condensing DAC3 Internal ConverterThe heart of the DAC3 is the ES9281A PRO DAC, which is well-regarded for its low noise and high fidelity. Due to the high signal-to-noise specs of the ES9281A PRO and the added benefit of double redundancy power source conversion and filtering, the DAC3 presents impressive low noise and low distortion characteristics. The DAC3 can process digital audio at any bit depth up to 32 bits and any sample rate up to 192kHz. DAC3 pads (upsampled) all bit depths internally to 32-bits, thus achieving a higher signal-to-noise ratio. DAC3 Headphone AmplifierThe DAC3 contains a high-performance headphone amplifier based on the LME49726 low-noise opamp. This amp is able to provide low-impedance, high-fidelity audio and a 2-volt output which easily drives a wide range of headphones, satisfying even the most demanding headphone enthusiasts. The DAC3’s relay-controlled stereo output can also be connected to any system with an analog audio input, such as Audioengine powered speakers. DAC3 PowerThe DAC3 is powered directly from the USB bus and power is passed through two stages of regulation to ensure no USB bus power variations affect the audio quality. This low-noise, low-ripple power supply is located on a separate circuit board for extra isolation and thermal management. DAC3 Volume ControlVolume for headphones and line-out is controlled directly from the DAC3 side panel. Smoothly adjust volume levels at fine increments without any undesirable noise or channel imbalance at lower volumes.