... : AC380V, 50HzControl Power supply: DC12-24VOn and off speed: rising speed 2-9m per min, slowing ... it is with small volume, little space to take up and light weight what reduce the loading for ... the buildings. Meanwhile, it is flexible on and off, little noise and fine decorative screen appearance. The ... arch, U type. The straight length can reach up to 100 meters. Application scope and Main Function: ...