This compact amplifier is a great addition to your small audio system. With a voltage range of .2V - 2V and a frequency range of 20Hz - 100HZ, it provides clear and powerful sound. Measuring about 3.25” X 4” X 1.25”, it is small. Its country/region of manufacture is unknown. Item is new old stock. Previous buyer advised it worked great in his motorcycle. Weight is 12 ounces plus packaging.