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1. Bluetooth function
2. Four/Six/Eight channels individual controls including:volume,echo,treble bass
3. Digital echo controls including volume,time depth
4. Four/Six/Eight microphone inputs
5. Four/Six/Eight line output controls
6. Built-in 5 bands equalizer
7. USB/SD input with playing controls
8. MP3 volume control
9. Master volume tape individual controls
10. Tape input and RCA output
11. LED vu meter display
12. Remote control
13. Dimensions:
     4Ch:400 x 225 x 215mm
     6Ch:480 x 225 x 215mm
     8Ch:555 x 225 x 215mm