Product Description: DK-40 is a USB computer microphone, and is capable of capturing sound in a three metr radius, with 360-degree coverage. It can simultaneously pickup all voices within the effective range. The device output uses USB interface that can be connected directly to a desktop or laptop computer for easy use in meeting rooms, and other occasions。Instant plug-and-play . Microphone Connection method Step 1: After getting our products, connect the mini usb male to microphone. Step 2: The usb male needs to be connected to the PC, laptop and tablet, they must have the sound amplification equipment, such as headphones, speaker, and then you can be used. Note: If there is no sound, please check your computer sound system. Look if the system already has a matching earphone or audio. Specifications: Sound Monitor Range：10-feet（3m） Frequency Response: 20~20k HZ Sensitivity: -42dB0dB=1V/Pa 1KHZ Output: Micro-USB Pickup Range: 20-feet (6m) Pickup Angle: 360° Dimensions: 2.9x 3.0 x 0.5" (75 x 75 x 12.5mm) Color: Sliver Operating temperature:-20°～+70° Standards compliant:Compliance with standard EU CE standards, US FCC certification Tips： 1.The size is manually measured, there is a difference of 1-3mm, please understand. 2. Product and picture will have a few color differences. 3. If you have any questions, please contact us and we will do our best to you. Package： 1*Microphone 1*USB cable