1. This Condenser Microphone only works with the device which could provide enough power (Voltage Required: 5V) for it. When this condenser microphone connected with desktop computer, it could be used alone; When this condenser microphone connected with laptop computer, please connected the laptop to electrical outlet, or use a 48V phantom power to get enough power if the sound is not clear and high enough.  
2. If your device could not provide enough power (when used with Amplifier or Mixer, etc.), the sound volume recorded might be low, and please use a extra 48V phantom power adapter to connect it. (phantom power adapter is not included).  
3. The microphone can not be used with mobile phone and tablet computer. NOTE: It cannot work with Mac.  
4. If you want better sound effect, a sound card should be used.  
5. When recording, please put the microphone away from the amplifier to prevent recording noise due to amplifier.