Convenient Use The main pins of the LM386 chip are exposed on the board, allowing direct input of audio signals. This makes the board userfriendly and hassle for quick setups. Onboard LM386 Chip This mono amplifier module is equipped with the LM386 chip, known for reliable amplification and consistent performance in compact audio projects. Compact Size Dimensions: 41.00 x 14.00 x 14.00 mm (1.61 x 0.55 x 0.55 inches). Its small footprint allows easy installation in a variety of setups, making it suitable for DIY projects or integrating into existing audio systems. 20x Gain Circuit Design Features a 20x gain circuit design, which boosts the volume and intensity of the audio signal for a more immersive listening experience. Use scenarios DIY compact speaker projects: connect a small audio source and a speaker to quickly add amplification in a compact form factor. Embedded or integrated audio: suitable for adding mono signal amplification to existing systems or microcontroller projects that require louder mono sound. Toys, alarms, and voice prompts: useful for simple mono audio outputs in portable devices or educational projects where space is limited.