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Please read the readme.txt included in the ZIP
The Eachine E180, is Eachine's first direct drive collective pitch helicopter. It's a 200 size class machine. A direct drive brushless main motor is a more expensive way to run the main rotor, but it has many advantages... Efficient, quiet, powerful, operates nice & cool (longer motor & bearing life), is way more robust and reduces the parts count. It also looks great!
Some content in menu 2.