the motors and accessories are fit for kinds of straight and arc curtain tracks. Low noise, shakeless. Motor power: 30W, 45W, 60WRated Voltage: AC230V, 50Hz/60HzInsulation class: EMoisture ressitance class: IP4.1Rated torque: 0.8Nm(30W), 1.2Nm(45W), 1.6Nm(60W)Rated rotating speed: 88.6rpm at 50Hz, 106.3rpz at 60HzCurtain moving speed: 0.12m/s at 50Hz, 0.14m/s at 60Hz