Built-in Dual-Core chip with a high-performance ARM -M4F core and a 32-bit core for superior processing capabilities. high-performance AD/DA conversion supporting 24-bit, 48 kHz Sample Rate and 110 dB SNR for high-quality audio recording. Loopback Button allows music playback to be transmitted back for recording on computers or mobile devices. Bluetooth Button enables wireless accompaniment with a clear connection status indicator. Power Port allows charging of the phone while live streaming without occupying the charging port. 1: Loopback Button When playing music on the computer/mobile phone, the music can be transmitted back to the computer/mobile phone for recording by using Loopback button. 2: Volume input Button Adjust the input volume level. 3: Sound Card jack Connect sound card only, you can record vocal effects or wired in accompaniment. 4: Headphone Monitor Button Earphone monitoring be input after turning on the button, stopped monitoring input is after turning it off, but the input signal can be recorded to the mobile phone/computer. 5: Volume Monitor Button Adjust the volume level of the headset jack. 6: Headset jack Connect the headset can monitor the music and record phone calls. Color: As Shown Material: Plastic+Metal Package Contents: 1*Adapter 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.