This bluetooth handheld speaker microphone 3-layer filter sponges to prevent breaking sound and noise, so it can provide lear sound. The home wireless speaker mic combined with noise reduction technology, makes the microphone sound quality clearer. The bluetooth speaker mic features a console with text instructions makes it easier for you to use. The wireless singing microphone features Bluetooth function and can connect with many types of phone and tablets. The bluetooth microphone is portable and is a good choice to use on many occasions, such as KTV, party, travel, and more. Specification Shell material: metal. Size: 20x7x7cm. Color: rose red, blue, silver gray. Output power: 5W. Frequency Range: 100Hz to 10KHz. Max Sound Pressure Level: >115db 1KHz TDH <1%. Reverberation Mode: Sound effect reverberation. Power Supply: Built-in 18650 Li-battery. Battery Capacity: 1800mAh. Charging Power: DC 5V. There might be a bit color distortions due to different computer resolutions. Please allow 1-3mm error due to manual measurement, make sure you do not mind before you bid. 1 * Microphone.(Battery built-in) 1 * USB charging cable.