Wireless Bluetooth Microphone with Speaker and player USB / AUX / TF Card / Bluetooth Material: Aluminum+ABS Style: Handheld Microphone come amplifier speaker Communication: Wireless Use: Karaoke Microphone Model: mobile phone karaoke microphone Pickup: Capacitance Power output: 3W (speaker output) Frequency: 100Hz-10KHz Maximum SPL: >115dB 1KHz THD<1% Echo: Echo sound reverberation Wireless: Bluetooth 4.0 Battery: Li-Polymer 3.7V/2600mAh Working time: 8 hours Charging power: DC 5V Size: 7 x 6.