This is a special recording chip for greeting cards. After the installation is correct, the sound is played when there is light. The recorded sound can be played. Ideal for DIY homemade greeting cards, gift boxes, invitations, student hand-made products, etc. The operation is simple and there are no complicated processes. Features: 1. After the installation is correct, the sound is played when there is light. The recorded sound can be played. 2. Repeatable recording, recording up to 60 seconds. 3. Built-in replaceable button battery for power supply, very easy to use. 4. Suitable for DIY homemade greeting cards, gift boxes, invitations, handmade products, etc. 5. The recording can be repeated, and each recording will overwrite the last recording. Specification: Color: green (light version) Recording time: 1 minute Working voltage: 3 button batteries (3.0-4.5V) Board size: 46 * 27 * 10mm / 1.8 * 1.1 * 0.4in Horn diameter: 40mm / 1.6in Thickness: 5mm / 0.2in Button line length: 5cm / 2.0in Weight: approx. 19g Package list: 1 * Greeting Card Chip Operating: Press and hold the recording button, hear the beep sound and speak to the microphone to start recording. Release the recording button to play the currently recorded sound. The photoresistor will play once and play the recorded sound once. .