The BTR13, equipped with Bluetooth and DAC functions, supports LDAC and aptX Adaptive, providing a high-quality music experience. It will be shipped in its unopened, shrink-wrapped condition via Rakuraku Mercari Bin (Takkyubin Compact). [Bluetooth Receiver Function] Attach it to your chest pocket or similar using the built-in clip and connect your favorite wired earphones/Hi-Fi wired headphones to listen. Your smartphone is free, which is Good! ♪ It has a 3.5mm standard earphone jack as well as the latest 4.4mm balanced jack. ♬ I have various other items for sale! #YonedaSukeShoten Please feel free to visit ♬ [DAC Function] It can also be used as a DAC amplifier (PCM 96KHz/16bit) by connecting it to a PC or smartphone via USB-TypeC. *You can switch modes using the three physical switches in the fifth photo. ( ① Bluetooth receiver mode, ② DAC (PC) mode, *Power supply & charging from USB ③ DAC (Phone) mode *Operates on the built-in battery) - Model name: BTR13 - Color: Black - Bluetooth support: Yes - DAC function: Yes - Supported codecs: LDAC, aptX Adaptive /HD /LL, SBC Thank you for viewing.