S2301=J3 Balsa KIT only
S2301B=KIT+4M Film (colors: Yellow 4M)
S2304=KIT+Motor (2212 1100kv)+ESC(20A E-Power)+Servo(9g*4)
S2304B=KIT+Motor+ESC+Servo+4M Film (colors: Yellow 4M)
$20 Flat Shipping US only--contact us at [email protected] to calculate international shipping cost