This is a general-purpose 4 Ohm 3-6 Watt Speaker which is generally used for all types of audio projects. It has a balanced frequency response and high efficiency. Very good high-range response. This is a transducer that converts electromagnetic energy into sound waves. It receives analog or digital inputs from computers or audio players and converts them into sound waves. The speaker has a resistance of 4 ohms and a power rating equal to 3W. Its small size allows it to be used in various applications where space is at a premium. This is used in general warning alarms for some projects, Simple amplifier projects, For Music systems, and will also fit in robotics projects. You can drive it on any of the MCU or development boards like Arduino, Node MCU and Raspberry Pi, etc. Small in size, so this speaker is best for DIY projects.