This type is miniature Worm Gear DC Motor, which can change shaft rotation direction while the wiring positive andnegative be changed. It is also have addition two characteristics:1 With self-locking, the output shaft can not rotation when switch off, that is self-locking.2 Gearbox output shaft and motor shaft are come to be a rectangle, it is widely used in various of occasions that require special installation size. Specification:Rated Voltage: 12V DC;No-Load Speed: 25 RPM;Output Shaft: 8mm x 15mm/1.22inch x 2.24inch(D*L);DC Motor Body Dimensions: 31 x 57mm/ 1.22inch x 2.24inch(D*L);Gear Box Dimensions: 58 x 40 x 35mm/ 2.28inch x 1.57inch x 1.37inch(L*W*H);Wire Length : 20cm; Applications: Boat, Car, Fan, Home Appliance, BBQ, Machinery and equipment, automation instruments, electric curtain, stage lighting, counter, , safe, wet towel , vending machines, automatic monitoring and other modern art. Package Contents:1 x Gear Box Motor