Specifications Dimensions: 240.5 x163.0 x107.2mm (Does not include protrusions) Weight: 551g (battery not included) Power supply: AAA size dry battery x4, Ni-MH battery x4, Li-Fe battery (2cell 6.6V)*, Li-Po battery (2cell 7.4V)*, (Batteries are sold separately.) Current: 200mA or less Channel: PWM 4ch / Serial 8ID *Maximum setting ID number of serial are different by each products. Frequency: 2.4GHz Radio Mode: XT Model memory 50 Compatible receiver: KR-420XT, " MINI-Z EVO Receiver Unit EX-NEXT MC-8" *If you use Li-fe, Li-po, you must use with our option unit (Battery stand Unit). *Can not use LCD Xpansion unit EXP-104 series. *Can not use FHSS or DSSS receiver. (KR-418FH KR-415FHD,KR-210S etc) *The product photos on this site are prototypes, which may be different to production models.