power output: 3W * 2
Frequency Range: 150Hz ~ 18KHz
Speaker size: Φ45mmx2/4Ω 
S/N signal-to-Noice : ≥80db

Size: 180*65*25 mm  Power: 5V –USB 3.5 audio input
Li-Battery: 3.7 V 1000 mA  Material: Plastic

Function: external battery, SD card, USB, FM, audio input, display lyrics 

Built-in digital audio decoding, beautiful pure sound, audio narration, PC, MP3, MP4, mobile phone the best of a brand new mini - speakers, clear treble, bass, pure ; unique design, quality performance better