| Model | USB-50W |
| Rated power | 15W |
| Case | Iron Case; Plastic Panel; No Handle; Plastic knob |
| I/O | 1 MIC IN; 2 AUX IN; USB IN; SD IN; |
| Speaker Output | COM/4-16ohm/100V; |
| Channel | 1 Channel |
| Tune | 2 Bands Control - Treble. Bass; |
| MP3 | Bluetooth; FM Radio; Remote Controller (5 RMB); |
| Amplifier Type | CLASS AB: |
| Acoustics | Frequency Response: 80Hz-18KHz; THD: <1% at 1/3 Voltage: |
| Protection | Simple Protection |
| Addition | Has Aluminum Radiator Inside |
| Remark | Class AB Type; Typical and Stable circuit which has produced more than 20 Years; Bluetooth and FM Radio Avaliable |