Specification: Item Type: Wireless Bluetooth Microphone_x000D_Material: ABS, Aluminum Alloy_x000D_Bluetooth Version: Bluetooth 4.0_x000D_Frequency Response Range: 100Hz-10KHz_x000D_Maximum Sound Pressure Level: 115DB 1KHz THD1%_x000D_Reverb Mode: Sound Effect Reverb_x000D_Built in Battery: 1800mAh 18650 Lithium Battery (included)_x000D_Charging Power: DC 5V_x000D_Sensor: Capacitor_x000D_Output Power: 3W_x000D_Interface: 3.5mm Aux, Memory Card, USB, Charging Port Features: 1Wide Compatibility: 4 in 1 karaoke mic can be used for microphone, Bluetooth speaker, MP3 player, recorder, compatible with various singing apps. 2Two Way Connection: Wireless microphone can use Bluetooth connection and cable connection, you just need to connect your phone with cable or Bluetooth and then open the singing app on your phone. 3Clear Sound, Vivid Sound Effects: Wireless microphone has built in clear sound and vivid sound effects, so you can listen and sing anytime and anywhere. You can also install Memory Card to use it. 4Rich Interface: Bluetooth microphone has 3.5mm AUX, Memory Card, USB and charging ports. Built in Bluetooth speaker can be connected to any Bluetooth enabled source (smartphone, for iPhone, tablet, car, PC, etc.) 5Superior Sound Quality: Bluetooth microphone's speaker vibration airflow reflux against the charge is small; sound reproduction is high, stereo; sound range coverage is wide, with excellent immersion and sense of existence. 6Multifunctional Buttons: Bluetooth microphone has multifunctional buttons, easy to switch to different modes, adjust the microphone, back sound and music volume respectively, enjoy the fun of singing with music. PackageList: 1 x Wireless Bluetooth Microphone 1 x Charging Cable 1 x Instruction Manual