Questyle

For maximum flexibility, Questyle SIGMA offers both wired and wireless switching options. Through the USB-C interface, the gadget connects directly to a smartphone, tablet or computer and works as an external DAC. For those who prefer a wireless connection, Bluetooth 5.4 is available with support for aptX, aptX HD, aptX Adaptive, Bluetooth LE Audio and LDAC codecs; SBC and AAC are also supported if necessary.