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Multi Frequency Garage Door Rolling Code Remote Control Duplicator. Multi-Brand Compatibility: Copies 110+ brands and works on 4 different garage doors with one remote. Wide Frequency Range: Supports 280-870MHZ including 300/348/387/646/779/928MHZ optional frequencies. Long Transmission Distance: Effective transmission range up to 100 meters for reliable control. Customization Support: Supports customized logo printing and unique version product design. Multiple Code Types: Supports Rolling Code, Fixed Code, Learning Code, and Copy Code. Manufacturer Direct: 100% factory specialized in auto alarm and RF remote control systems. Quality Warranty: All products come with an 18-month warranty for quality-related problems.