Specification Brand : ngnsky BulletPoint1 : [Voice control] Smart relay switch ,helps you control home devices with voice,Once given a simple voice command, it will switch on/off light or other devices,That brings you the charm of the smart switch other than tedious handwork. BulletPoint2 : [APP and Remote control] The Smart Mini DIY Relay Module can be controlled by connecting with the outlet through 2.4g Hz wifi. No matter where you are, you can control the switch at will. BulletPoint3 : [Support Two-way Control] 16A current, suitable for most household equipment. This smart DIY switch could be used for your old 2-way control switch. Especially, you still available to control the old switch manually after installed it. BulletPoint4 : [Timing] Smart relay switch with timing on/off function, you can install it on any appliance and give your appliance timing through the phone, giving you one less thing to worry about in your busy life. BulletPoint5 : [Mini Body] Designed 41*41*20mm mini body, which is working with most of the amounting boxes, switches, and wall sockets. It is not only small but also powerful. it can be used for most home appliances and lightings. CircuitType : 3-way Color : White ConnectivityProtocol : RF ConnectorType : Screw ControlMethod : remote CurrentRating : 16 amps ExternallyAssignedProductIdentifier1 : 081904950752 ExternallyAssignedProductIdentifier2 : 0081904950752 IncludedComponents : Smart Mini DIY Relay Module InputVoltage : 110 volts ItemName : WiFi Smart Mini DIY Relay Module 3-Way Wall Switch Compatible with Alexa App and Voice Control,16A (4 Packs) ItemPackageQuantity : 1 ItemTypeKeyword : electrical-outlet-switches Manufacturer : ngnsky MaximumSwitchingCurrent : 16 amps MaximumSwitchingVoltage : 110 volts MeasurementSystem : Inch ModelNumber : 4 Packs MountingType : Through Hole Mount NumberOfItems : 1 NumberOfPositions : 1 OperatingVoltage : 110 volts OperationMode : Automatic PartNumber : 852wf ProductDescription : Mini 3-Way DIY Relay Switch Material: ABS Voltage: 100-240VAC 50/60Hz Max. Current: 16A Size:41mm*41mm*20mm Color:White Button life:100000 times Fire Rating:94-V0 Wifi: 2.4GHz 802.11b/g/n Certification: CE, FCC,RoHS