Qualcomm Bluetooth Bluetooth chip: QCC5125 Bluetooth protocol: LDAC/AptX adaptive/AptX-HD/Aptx-LL/Aptx/AAC/SBC Bluetooth sampling rate: 44.1khz/48khz/96khz (the highest) Bluetooth sampling bits: 16bit/24bit (the highest) Bluetooth version: version 5.1 Decoding chip: SA9227 External Bluetooth antenna 20 meters long distance transmission(in the open without interference) Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Material: Aluminum alloy colour: black Package Contents: 1 x LDAC Audio Recorder 1 x Power Adapter 1 x Fiber Optic Cable 1 x Audio Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.