For BRUSHED motors only This is a DIME!MX9104 Micro ESC Click here for details!See table below for purchasing details. Gate Voltage Boost -- This feature provides high efficiency operation through the entire flight especially when battery voltage drops toward the end. Current Limit -- ESC will shut down when current surge to 2x of rated current. sw --switchable, mech --mechanical switch,sfwr --software switch Model Current amp. No. of cells Wt. oz Size in. Brake Freq. Arming Gate V boost Current limit BEC Soft Start Auto Cut Applications MX9208Learn more 8 5-8 0.2 0.3x0.8x0.2 y hi sfwr y n y y y Speed 280, 370 MX9225Learn more 25 6-12 0.6 1.4x0.7x0.3 sw hi sfwr y y y y y Speed 400, 480, Cobalt 400 MX9240Learn more 40 6-12 0.7 1.4x0.7x0.3 sw hi sfwr y y y y y Speed 500, 600, Cobalt 05