Notes:1. A neutral wire is required for switch installation.2. Bluetooth is only for network signal connection and cannot be used alone. Wi-Fi + Bluetooth is more stable.Specifications:Relay: 20APower: 4000WVoltage: AC 110-240V 50/60HzOperating Temperature: 0°C-40°CRadio Frequency: 2.4GHzRF Operating Frequency: 433.92MHzRF Encoder Chip: EV1527RF Modulation: ASKMaterial: V0 Flame-Retardant PC + ABSEuropean Standard Switch Dimensions: 8.6cm*8.6cm*3.88cmFeatures: --[24-Hour Online AI Assistant]After connecting the switch to the Smart Life app, you can use the AI Assistant to query various functions and parameters with one click. Simply enter a simple command in the dialog box to enjoy a more advanced AI experience, eliminating the need for searching. For example, you can enter Query electricity usage for the past seven days or Query water heater switch wattage.--[4000W High Power]This 20A high-current, 4000W high-power switch is suitable for high-power appliances such as air conditioners and water heaters.--[Voice and Mobile App Remote Control]The switch can be remotely controlled via the mobile app, supporting various voice commands. It can also be controlled via smart speakers such as Amazon Alexa, Google Assistant, Tmall Genie, Yandex Alices, and SmartThings.--[Energy Statistics]The mobile app allows you to monitor, query, and collect statistics on electricity usage in real time, helping to control power usage, achieve energy conservation, and better manage energy consump