1 Voltage :1.5-12V 2 Speed :10-1000RPM 3 High torque quiet,good ... Lock, Toys, camera,robotReduction ratio: 1:10 :1:35,1:63, 1:86, 1:115,1:150,1:250,1:360Specification MODELReduction RatioVOLTAGENO LOADAT MAXIMUM EFFICIENCYSTALLSPEEDCURTRENTSPEEDCURRENTTORQUEOUTPUTTORQUECURRENTVr/minAr ... questions, Please call to 86-574-27950958 6v and 12v 1:250 ratio 50rpm high torque powerful small metal gear motor ...