For sale, an Audioengine D2 24-BIT Wireless DAC- Sender + Receiver. I have the original boxes, and all parts/cables etc. are included. For some reason, the black plastic parts have gone a bit sticky (dust? oil?). I have noted the condition as 'fair' in accordance. In any case, it's something that's more to the touch than visible.

This is a really cool (and simple!) gizmo. The Audioengine D2 is a DAC (digital-to-analog converter) transmitter and receiver pair. It allows you to transmit and control a digital audio signal from one place, and receive it as either a digital or DAC-converted analog signal elsewhere.
With this pair, you can send digital audio from your computer, hi-fi, CD-transport, DAT, stereo receiver, DAW, or etc. and have it received remotely at your power amplifier or active monitors. You control the volume at the transmitter, so all you need to do is plug the receiver into your powered monitors, power amplifier or pre amplifier, and you've got an instant remote-volume-controlled hi-fi playback system.

Sounds especially good if you go Optical out from the receiver end to your DAC. 

More info:
https://audioengine.com/product_tech_specs/d2-24-bit-wireless-dac/

Reviews:
https://www.kenrockwell.com/audio/audioengine/d2.htm
https://www.head-fi.org/threads/rev...i-res-usb-optical-spdif-dac-transport.858615/

Can ship anywhere.
Price is net to me after shipping and/or other fees.
Cheers.