Back board comparison

1. Sound sensitivity potentiometer with outside handle is separate from MIC of other companies¡¯M020G compare with Big Dipper on the back board in parallel with MIC.

2. The back board arrangement of systems is much different.

Front board comparison

1. Other companies¡¯MIC is fixed on the front board compare with Big Dipper on the back board.

2. The fixing of inner components is very different from Dig Dipper when look inside through window.

Inner comparison

1. Replica use outsourcing power switch and is separate from main control board, Big Dipper use self-developed power switch and is on the same board with main control board.

2. Replica use very thin and simple plastic packing motor and the fixing is very simple. Big Dipper use self-developed motor with high stability and the fixing is very reliable.

2. Replica use very thin and simple plastic packing motor and the fixing is very simple. Big Dipper use self-developed motor with high stability and the fixing is very reliable.

4. The inner components of replica are orderless and poor repaired, the whole appearance looks not reliable.

5. The motor fixing shelf of replica is easy to be rusty, Bigdipper use rusty-proof Galvanized plate motor shelf.

6. Replica¡¯s laser diode is not stable,

 Big Dipper¡¯s is stable with good heat emitting function.

7. Replica systems use rough materials with cost about RMB120.

 Big Dipper always considers the stability and quality as our final goal.