Welcome to our shop! This greeting card module is customizable to record music or whatever you want to say for up to 4 minutes. It has a light sense function to trigger the button and play music. The module is powered by 3 AAA batteries and has an 8Ω 0.25W environmental speaker, providing a loud enough sound. The microphone, key, speaker, and battery are already welded onto the module, making it convenient to use upon receiving the product. It is great for Christmas cards, gift boxes, jewelry boxes, crafts, children's toys, and more. Specifications: - Recording time: 4 minutes - Working voltage: 3 button batteries 3.0V-4.5V (Batteries are included) - Board size (L*W*H): 46 * 27 * 10mm/1.8 * 1.1 * 0.4in - Speaker diameter: Approx. 40mm/1.6in - Speaker thickness: Approx. 5mm/0.2in - Key cable length: Approx. 5cm/2in - Optional play modes: Single play, loop play Package Includes: - 1 Greeting Card Module Recording and Playback Operation: 1. Press the record button, hear the "DI" sound, and release the record button. Then speak at a distance of 5-10 cm from the microphone to start recording. 2. Press the record button again, and hear the drop sound to indicate that the recording is complete. 3. Press the play button to play the currently recorded sound. Press the play button again during playback to stop the sound. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.