1. Three relay states: default on after power failure, default off, and memory function. 2. Offline Reminder: This device offline reminder function helps users keep track of device status and effectively prevent device failures. 3. Device Sharing: Home Family members can control the switch from their own phones using the device sharing feature. 4. Group Control: Create smart groups for the switch and control multiple smart devices with one click through the app. For example, set up a "sleep group" and, when you're ready for bed, turn off all group devices with a single click. 24/7 Online AI Assistant: Once the switch is connected 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 without the hassle of searching. For example, you can enter "Query electricity usage for the past seven days" or "Query water heater switch wattage." [RF433 Remote Control Support] The switch supports RF433 remote control with an effective sensing range of 100 meters (RF433 remote control required for separate purchase). [WIFI + Bluetooth Dual-Mode Connection] Turn on your phone's Bluetooth to automatically search for networks, quickly configure your network, and connect to the app faster, with network speeds approximately twice as fast as single-mode WIFI. Notes: 1. A neutral wire is required for switch installation. 2. Bluetooth is only for network signal connection and cannot be used alone. WIFI + Bluetooth is more stable. Parameters: Relay: 20A Power: 4000W Voltage: AC 110-240V 50/60Hz Operating Temperature: 0℃-40℃ Radio Frequency: 2.4GHz RF Operating Frequency: 433.92MHz RF Encoder Chip: EV1527 RF Modulation: ASK Color:Black Material:ABS