Specification Material:Aluminium Alloy;  Output Power:5W/6W;  Frequency Range:100Hz-10KHz;  Maximum Sound Pressure Level:>115dB 1khz THD<1%;  Reverb Mode:Echo sound reverberation;  Power Supply:Built-in-li Battery;  Battery Capacity:2200mAh;  Charging Voltage:DC 5V;     Features: ADJUSTMENT DYNAMIC LED LIGHT Music~ 48 colorful LED lights of microphone will flicker with the rhythm. Higher volume, brighter light. If long pressing "M", the LED light will appear/ disappear.  4-IN-1 KARAOKE MICROPHONE The excellent design of our karaoke microphone is very suitable for your hand, which can make you feel more comfortable. And the built-in high-quality Bluetooth module can be used as speaker, player and Recorder, compatible with various singing applications.  TWO WAYS CONNECTION Bluetooth Connection & Cable Connection. You just need to connect your phone with cable or Bluetooth, and then open the singing APP on your phone. The built-in clearly audio and vividly sound effect can make you enjoy listening and singing anytime and anywhere. Great for KTV singing, gathering singing, family singing, travel singing, car stereo, instrument recording, interviews and live ect.  HIGH COMPATIBILITY Supporting micro SD card max 64GB(NOT INCLUDED) and song switch. The Bluetooth has a great distance of connection(10m), and supports Android, for iPhone, for iPad, for IOS and all Smartphone.  EASY TO USE Multi-function buttons can adjust the Music, Volume and PA/R. Free to switch the previous and next song mode. Adjustable echo length effect can bring super surround with immersive enjoy. And the USB port allow you to plug USB and turn this magic piece to MP3 and play directly.  Package Included: 1 x Karaoke Microphone;  1 x Micro USB Cable