Wireless portable usb mini car speaker for laptop with alarm clock.Portable music mini car speaker with fmUsb mini car speaker for laptop with alarm clock* Power: 3Wx2* Frequency response: 120Hz-18KHz* Speaker: Φ40mm/4Ω* SNR: ≥75db* Li Battery: 3.7V 500mA* Working Voltage: DC5V* Built-in MP3 Decoding function, Plug and play* Support U disk, TF card, support 32GB* With digital screen display* With Calendar, Alarm clock, Sound card function.* PC card reader function (it can control the MP3 player like Kugou, QQ music,etc automaticly to pause playback, switch down song).* 1pc: USB+ line in; 1pc: Two-in-one line; 1pc: Li BatteryThis is the most powerful music player and mini speaker. Stylish car shape and delicate design. Best stero sound quality. Enjoy music anywhere anytime. It is an extraordinary audio device and offers the right balance between sound quality and portability.