Product introduction: 1. Waterproof and anti -collision anti -overload: rainproof design, thickened body, and automatic power off -power disconnection. 2. Pure copper plate -type motor, good heat dissipation. 3. High -intensity galvanized lifting chain, high safety factor, can effectively prevent rust. (The chain can be customized, more invisible, suitable for indoor) 4. Built -in overload clutch. When the load is more than the rated load, the motor does not increase the air rotation, which effectively prevents the overload from damaging the gourd body and chain. 5. Large -capacity chain bag is wear -resistant and is not easy to damage.