Battery: Built-in 3.7V/1800mAh (the battery can be used for about 6 hours when the power amplifier is turned on) Power indicator (LED): power on: white light; charging: red light; low battery status: beep 2 minutes/time Charging time: (power off) about 3 hours Charging interface: TYPE-C interface<br><br>Sound card function: Yes 48V phantom power: Yes Built-in battery use: Yes Use while charging: Yes Low power indicator: Yes (beep sound) Sound adjustment: high/mid/bass adjustment; accompaniment, reverb, recording, ducking, voice changing, monitoring adjustment; microphone volume adjustment; Function keys: 11 keys Sound effect buttons: 10 keys Special effect buttons: 7 keys Bluetooth switch: support Accompaniment input: 1 channel (3.5 ports) Condenser microphone input: 2 channels (3.5 ports) Headset output: 1 channel (3.5 ports) Headphone output: 1 channel (3.5 ports) Live broadcast interface: 2 channels (3.5 ports) OTG interface: 1 channel (TYPE-C port) Charging interface: TYPE-C port Moving coil interface: XLR female socket 48V interface: XLR female socket Analog audio output: /RT, stereo Dynamic range 1kHz:≧105dB Crosstalk:≧-106dB Signal to noise ratio:≧85dB Output level (Vrms):Vrms(1.0~2.0V 10kR) Headphone output power: 5 mW x2CH Frequency response: 5MHz (Less than-3dB) Colour:Black Material:plastic<br><br>Package Contents: 1 x TYPE-C data cable 1 x four-section audio cable 1 x sound card<br><br>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.