The LM386D is an Audio Power Opamp made by HTC Korea. It is a 8-pin Small Outline Package (SOP) device that is RoHS-certified and lead-free. It is a wide-bandwidth, low-power amplifier designed to drive audio signals into low-impedance, 8-Ohm loads. It can be used to boost signal level and even drive a pair of small speakers. It can also be used in applications such as mic preamps, portable recorders, radio tuners, and more. It features adjustable gain control and low harmonic distortion, and operates from a variety of wide supply voltages from 3 to 18V.