Ultrasone SIRIUS Bluetooth Adapter for Ultrasone Headphones - Discontinued active-noise-cancelling The SP4000 is packaged with

The SP4000 is packaged with a premium leather case crafted from Shrunken Calf by Perlinger

What is the Bluetooth range and version

The internal structure design effectively manages to transfer the powerful circuit’s high temperature to the chassis’ heatsinks

*TWS (True Wireless Stereo) products use Bluetooth to connect to earbuds

granting you an unrivaled sonic transparency and lifelike presence

Ultrasone SIRIUS Bluetooth Adapter for Ultrasone Headphones - Discontinued active-noise-cancelling The SP4000 is packaged withThe Ultrasone SIRIUS is a Bluetooth adapter designed for the Performance Series headphones including the 820, 840, 860, and 880. The adapter is curve shaped to cling precisely to the shape of the headphone and attaches to the cable input on the earcup. With a weight of only 12 grams, the adapter is inconspicuous and comfortable to wear. The Bluetooth technology incorporates the aptX codec for high quality, lossless audio streaming. Specially adapted