This product is available in two models: NICE-DA-SOP2 and NICE-DA-SOP4, with the only difference being the power size. The NICE-DA-SOP2 has a power rating of 200W, while the NICE-DA-SOP4 has a power rating of 400W. The NICE-DA-SOP4 can replace the NICE-DA-SOP2. For door opening distances of 700-900mm, the 200W model is recommended, while the 400W model is recommended for door openings greater than 900mm and for asynchronous motors.
