KM660 condenser microphone is the best choice for singing or recording without going to KTV. With it, it can capture your voice with pickup hole without aiming at microphone and you can enjoy an audio feast with echo reverberation technology. You can connect with your phone with cable or Bluetooth function and It supports almost singing software no matter on the phone or on the computer with millions of songs for you to choose. No need to buy more accessories and simple operation which favors by people who practice singing, recording, etc. Features: [Wireless Bluetooth Connection & 3.5mm AUX-IN] You can connect with your phone with cable or Bluetooth. Download an APP which has karaoke function on your smart phones or other devices. You can sing your wanted songs via Bluetooth function. Or you can connect your phone with microphone via 3.5mm audio jack. [Echo & Volume] Echo and volume can be adjusted at your wish and you can switch songs directly by short pressing volume button. Echo effect is much like KTV, you will feel liking being on the scene of karaoke. Make sure that you can enjoy an audio feast with echo reverberation technology. [Flash Light Function] The flash light is turned on while pressing the button of "LED POWER" longer. Flickering accompanied by the rhythm of the music while singing which creates performance atmosphere with 9 LED lights. 4 flashlight is also helpful when in dark place. You will be intoxicated with your voice and stereo sound quality accompanied by dazzling lights. TF Card Function & Singing Software] It supports TF Card (maximum up to 128GB). Once inserted, you can play or sing songs that you pre-download in TF card instantly. It supports almost all singing softwares no matter on the phone or on the computer with millions of songs for you to choose. Fashion Design & Easy Operation] Made of metal material body, it is high quality which is fashion and up scale. With imported mic sensor and drop resistant mic, you can sing at anytime and anywhere with clear and exquisite sound quality. No need to buy more accessories and simple operation which favors by people who practice singing, recording, etc.