Model No.: A2217Rpm/V: 950KVWeight: 70gMotor Dimensions: 27.5*30mmShaft Size: 4mmBattery Opernating: 2-3 LipoMax. efficiency current:5-15A(>%75)NoLoad current/ 10 V:0.9ACurrentcapacity:15A/60sInternal Resistance:95mΩMax. efficiency:80%