New product in original packaging. Supported Bluetooth codecs SBC, AAC, aptX, aptX LL, aptX HD, LDAC THD+N Optical : 0.00087% Coaxial : 0.00087% RCA : 0.07% Output level Optical : 0.5Vp-p Coaxial : 0.5Vp-p RCA : 2V xDuoo offers with its XQ-50 Pro2 an excellent Bluetooth receiver, easy to use and powerful, which will allow you to transform your audio installation into a wireless system. It becomes possible to broadcast your music remotely, directly from your smartphone, tablet or any other connected device. The XD-50 Pro2 uses a highly efficient Qualcomm QCC5125 Bluetooth 5.1 receiver chip that supports the high-resolution codecs aptX, aptX HD and LDAC. These allow you to enjoy excellent sound quality when transmitting your music via Bluetooth. The digital / analog conversion is provided by an independent chip, a DAC ESS ES9018K2M, for a precise sound reproduction. The front panel of the receiver has a 1.3" OLED screen, displaying all the information concerning the playback of your files: Bluetooth codec used, sampling rate of the file or even the title of the song. Finally, the XQ-50 Pro2 can be connected via USB-C to a computer. In this case it can work as a USB DAC. Just to be clear: this is not an amplifier, but a Bluetooth receiver of excellent quality that needs to be connected to an amplifier. It will be shipped to you in the original box (as shown in the photos), wrapped in bubble wrap, and then placed in an outer box for added protection.