For swing gates up to 600 lbs and 16 feet long.The integrated control unit offers several features, such as 7 day programming,protection against electric shocks, programmable connections to externalaccessories such as lights, keypads, etc. Master/slave management, two unitssynchronized for dual application. Reliable, the operator is safely protectedfrom water and dust by the cover which can be easily removed to rely onmechanical release in case of need. Long-time protection from corrosion. Theinside mechanism is appropriately separated by the chain slots to avoidpenetration of water, dirt or small animals. Solar-power compatible.