This module is a compact and easy-control speaking recognition board, it supports up to 80 voice commands, which 7 of them can work simultaneusly. First of all, you will need to train the module and you could use any sound as a command. It doesn’t matter the lenguaje!This board has 2 operations modes: by using serial communication (UART Rx/Tx) which provide full functionality and by using the general input pins for partial functioning. It also includes general output pins.SpecificationsVoltage: 4.5-5.5 VNominal current: <40 mADigital interface: 5 V TTL for UART and GPIOAnalog interface: 3.5 mm mono-channel microphone connectorSize: 31mm X 50mmManualLibrary