adjustment can make your recording more fluent and more stable. On-board Recording with 8G Internal Memory: Built-in 8G memory card, you never have to worry about drop outs or audio issues again. One button for starting or stopping recording, easy to operate. Digital Analog Output Modes: The microphone can identity interface of your device automatically, compatible with 3.5mm and USB interface devices. Universal for cameras, smartphones and computers. Recording File High-speed Transmission and Copy: Supports internal and external MIC input modes, and the recording file can be transmitted via USB-C interface of the transmitter, very convenient to use. Specifications: Brand: COMICA Model: BoomX-D PRO D2 Color: Black/ White(optional) --Transmitter (TX) Transmitting Power: 43;10dBm Receiving Sensitivity: -86dBm Antenna: PCB Antenna Polar Pattern: Omnidirectional Frequency Response: 80Hz ~ 20kHz Sound Delay: lt;20ms External Mic Input Interface: 3.5mm TRS --Receiver (RX) Transmitting Power: 43;10dBm Receiving Sensitivity: -86dBm Antenna: PCB Antenna Audio Output Amplitude: 43;0dB ~ 43;12dB Sound Delay: lt;20ms Audio Output Interface: 3.5mm TRS USB-C Digital Output: 48kHz 16bits Monitor Interface: 3.5mm TRS/TRRS Battery: Built-in Li-ion Battery 330mAh 3.7V Recording Time: about 24 hours Item Weight: 29g/ 1oz Item Size: 3.9 * 2.2 * 5.5cm/ 1.5 * 0.9 * 2.2in Operating Temperature: 0 ~ 50 Packing List: 2 * Transmitters(TX) 1 * Receiver(RX) 2 * External Microphone 2 * Wind Muff 1 * 3.5mm TRS-TRRS Audio Cable 2 * 3.5mm TRS-TRS Audio Cable 1 * 3-in-1 Charging/ Output Cable 1 * Reset Pin 1 * Carry Case 1 * User Manual(English)