PD This Bluetooth Wireless Microphone System provide high sound quality and professional features Unique shape stylish and portable to carry Its a great microphone device for party speech karaoke family entertainment meetings and so on Support Bluetooth Connection and Line in Connection you can easily use it with all kinds of wireless devices NOTEYou will need a bluetooth speaker or power amplifier to connect with this KTV BOX to amplify the sound Please do not use the microphone facing the receiver too closely in order to avoid noise interference The host machine will take the initiative to stop the connection if you not connected the bluetooth in 2 minutes How to use it Step1 Power on Connect the power supply to the microphone system and turn it on Step2 Connect to your device Search the host machine Bluetooth model in your device cellphone or tablet and match it Or Use an 3 5mm audio cable to connect them Do make sure the audio cable fit in the R L IN This step needed only when you need background music Step3 Amplify the sound Find a speaker or an amplifier to connect with the microphone system do make sure the audio cable fit in the R L OUT both 3 5mm6 35mm audio cable work Package Includes 1 X receiver2 X Handheld microphones1 X 6 5mm audio cable1 X Adapter1 X User Manual