Features: 1Multiple Control Linkage: No need to worry about rewiring issues. You can achieve dual or even multiple controls on a single light after setting it up in the app. 2Power On Status Setting: Set the switch to be turned on or maintain its original state after a power outage, based on your habits and needs. Ensure the normal operation of your home devices. 3Various Installation Methods: The switch controller supports multiple installation methods. Its bracket can be locked on a guide rail or fixed inside a wall box with screws to ensure stable installation. 4Device Sharing: Share smart controls with family members, smart relay switch creates a personalized smart home for all. 5Switch State Synchronization: Supports dual control functionality with matched switches. You can set either toggle switch or state synchronization as the operation type. With state synchronization enabled, the switch positions are fixed and synchronized with other switches. Specification: Item Type: SmartRelaySwitchMaterial: PCWeight: Approx. 52g / 1.8ozOperating Temperature: -10-65CCurrent: 10AProtection Level: IP20Product Size: Approx. 40x40mm / 1.6x1.6in Package List: 1 xSmartRelaySwitch1 x Bracket1 x User Manual