Features: 1. Customizable to record music or voice messages for up to 4 minutes. 2. Activated by light sensor to trigger button and play audio. 3. Powered by 3 button cell batteries, equipped with a 16Ω 0.25W speaker that delivers clear and sufficiently loud sound. 4. Pre-assembled with microphone, buttons, speaker, and battery connections; ready to use upon receipt. 5. Ideal for use in greeting cards, gift boxes, jewelry boxes, crafts, and children's toys. Specification: - Recording time: 4 minutes - Working voltage: 3 button batteries 3.0V–4.5V (batteries included) - Supports repeated recording; each new recording overwrites the previous one - Board dimensions (L × W × H): 46 × 27 × 10mm / 1.8 × 1.1 × 0.4in - Speaker diameter: Approx. 40mm / 1.6in - Speaker thickness: Approx. 5mm / 0.2in - Button cable length: Approx. 5cm / 2in - Play modes: Single play, Loop play Package List: 1 × Greeting Card Module Recording and Playback Instructions: 1. Press the record button until you hear a "DI" sound, then release. Speak clearly within 5–10 cm of the microphone to begin recording. 2. Press the record button again and release when you hear a tone, indicating recording is complete. 3. Press the play button to playback the recorded message. During playback, press the play button again to stop. Note: The button with the red wire is the record button; the button with the black wire is the play button.