Motor: Brushless 4800KV Servo: 7g*4pcs ESC: 15A Helicopter E-RAZOR 250 Helicopter E-RAZOR 500 Specification: ltem: DY8916 Main rotor diameter. DYNAM is a manufacturer that it is main produce RC products and sale. Product Name: E-RAZOR 250. Item: DY8919 Instruction Manual | FMS View and Download Dynam E-Razor instruction manual online. E-Razor toy pdf manual download. WARNINGS As the user of this product, you are solely responsible It is a well built heli with metal head components and carbon chassis. I have some concerns about the manual. In fact there is a lack of manual for this heli e. the initial voltage of battery pack), and 0% means the low voltage cut-off function is disabled. For example: For Before commencing assembly,Please read the instruction manual! TEL:+86-769-87566018 FAX:+86-769-87555185 E-mail:sales@dynam-rc.cn. Made In China.