... . 1) manufacture AC, DC, AC and DC Roller shutter operator , design and make motors according to ... )with four relays inside to make sure our Roller shutter operator to be more save.5)100% ... and durable than other motors6) make dimension of Roller shutter operator bracket system according to your request, ... function, lighting and so on…8) our Roller shutter operator pass CE and we start exporting since ...