Highlights: DAC + Headphone Amplifier - Tone2 Pro combines the ESS ES9038Q2M with x4 OPA1612 operational amplifiers that deliver superior audio quality. High Performance - Up to 32bit 384KHz sample rate, bit-perfect DSD512, and -118dB THD+N (line-out). Hardware MQA Decoding - XMOS XU216 processor for full MQA decoding, enabling next-gen "original master quality" web streaming and audio playback. Balanced RCA - Next-generation "balanced RCA line-out" with 3-pin output, sets a new interface standard for the Hi-Fi industry. Linear Power Supply - Tone2 Pro has a second USB-C (I2S) port that supports 5V linear power supplies for ultra clean signal-to-noise ratiowhat's it in boxx1 Tone2 Prox1 USB-C Cable (Type-C to C)x1 Instruction Manualx1 Warranty Card