Compact Compatibility: The S-MATE2's compact size fits various installation boxes, including EU/86 and 120 types, accommodating multiple switch types like push-button and rocker switches eWeLink-Remote Control: With S-MATE2 and a compatible smart switch like MINIR4 that features "eWeLink-Remote" gateway functionality, achieve up to 50M "eWeLink-Remote" for remote local control Versatile for Multiple Scenarios: Combined with other devices that have "eWeLink-Remote" gateway capability, S-MATE2 meets diverse home automation needs like two-way control and no-neutral wire solutions, enhancing convenience in your life 5-Year Battery Life: Powered by a 1000mAh 3V CR2477 battery, promising a long service life. Battery life data is based on internal testing by SONOFF; actual performance may vary Easy Installation and Integration: Designed for easy installation within standard installation boxes, S-MATE2 seamlessly integrates into your existing home setup, allowing for a straightforward upgrade to smart control Specifications: Model: S-MATE2 Input: 3V Battery model: CR2477 1000mAh Channel: 1/2/3 Casing material: ABS Dimension: 40.3 x 37.4 x 18.3mm