Digital speaker ,mini speaker ,usb speaker ,protable speaker ,mp3 speaker ,sound box

Output power: RMS 3W x 2
Frequency: 100HZ---18KHZ
Speaker Specifications: 2”x2/4Ω
S/N R: ≥75db
Carton Size:  W160x D39x H55mm
Supply power: ～5V-USB  3.5mm
Lithium batteries:3.7V 1000mA
Material: plastic box
Built-in: SD Card, USB decoder, built-in FM radio
With battery case, Nokia BL-5C replaceable lithium battery, lasting power