1. This product is an offline voice recognition control switch that supports record control, that is, customization function. It can record any command and supports any language type such as English, Russian, French, Korean, etc. 2. There are two record methods: Method 1: Use the button on the circuit board,single click to record command for"ON",and double-click to record command for"OFF", the control of single click and double click is similar to a mouse; After receiving the record command for"ON", the relay on the circuit will be turned on and off once as feedback, and after successful record, it will be turned on and off three times as feedback; After receiving the record command for"OFF", the relay will be turned on and off twice as feedback, and after successful record, it will be turned on and off three times as feedback; Attention: It is best to have 4-6 syllables for record commands, such as 5 syllables for 'Open Device' and 3 syllables for 'Goodbye'; Method 2: Use the command [RECORD-OPEN-COMMAND] [RECORD-CLOSE-COMMAND], to instead of button, these command need to be in English; After successful record, you can immediately use the record command to control the switch. Even if the module is powered on again, the recorded content remains valid. 3. Record command restriction: One open command and one close command can be recorded; The content of the later record will delete the content of the previous record; 4. Delete record command: It can be achieved by long pressing the button for 6 seconds; Or use the command[DELETE-OPEN-COMMAND]and [DELETE-CLOSE-COMMAND]; After receiving the instruction to delete the record, If the relay is turned on and off 4 times, it indicates successful deletion. 5. Input voltage range: 5V, output voltage equal to input voltage, can withstand 6A current; the input end have a protection for power reverse. Material: PCB Size:5*2.3*1.5cm Package Included:1Pc Note: Due to manual measurement, please allow an error of 1-3mm. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.