Specifications With four relays inside to make sure our rolling door motor to be more safe 100% copper material inside the motor, so it's a more durable than other motors Make dimension of rolling door motor bracket system according to your request, brake system built in the bracket system We could design control system function according to your request Functions: infrared sensor, ups, rebound automatic when meet obstacle, alarm function, lighting and more Primary Competitive Advantages: Experienced Staff Guarantee/Warranty International Approvals Product Performance Quality Approvals