PRODUCT DESCRIPTIONPROFESSIONAL TUNING BUTTON. PITCH / BASS/VOLUME/ACCOMPANY/REVERBERATION ALL CAN BE ADJUSTED VIA THIS MICROPHONEBLUETOOTH WIRELESS MICROPHONE AND SPEAKER 2 IN 1 , CAN WORK INDEPENDENTLY WITHOUT EXTRA CONNECTIONMICROPHONE HEAD HAS THREE TIMES NOISE REDUCTION HANDLE , MORE EFFICIENT TO HIGHLIGHT YOUR BEAUTIFUL VOICE2600MAH BATTERY FOR UP TO 8 HOURS OF SINGING, ENJOY KTV KARAOKE EFFECTS WITH THE SMARTPHONE APPCOMPATIBILITY , FIT FOR IOS AND ANDROID SMARTPHONE IPAD TABLET , CAN READ USB CARD , BLUETOOTH CONNECTION STYLE:HANDHELD MICROPHONE COME AMPLIFIER SPEAKERCOMMUNICATION:WIRELESSUSE:KARAOKE MICROPHONEWIRELESS:BLUETOOTH 4.0SPEAKER DRIVER:3WBATTERY:LI-POLYMER 3.7V/2600MAHWORKING TIME:8 HOURSMATERIAL:ALUMINUM ABSSIZE:9.45X2.85INCHPACKAGE:1XAUDIO LINE 1XCHARGING CABLE  1XPRODUCT MANUAL