Main chip ISD1820 for voice recording and playback Power and voltage Power supply: 3 attached 5V, can be installed pin header Rated working voltage: DC 3 5 V Control options Recording/Playback control: Can be driven by a button or a single IO pin; uses a control line Benefits and fit Enables simple, lowvoltage voice recording and playback in small electronic projects Flexible control interface supports direct button operation or microcontroller IO control Compatible with common 35 V DC systems and easy to wire with pin headers Applications and use scenarios Toy or hobby projects that require spoken prompts or messages triggered by a button Doorbell, alert, or notification devices in compact electronics that need audible feedback Educational electronics kits to demonstrate basic voice recording and playback functionality Notes Maintains the original chip isd1820 based functionality and operating voltage range No additional features beyond the specified main chip, power, voltage, and control modes are included