LM386 Low Voltage Audio Amplifier IC KCD4 It is a power transistor

It is a power transistor that combines an input MOS and an output bipolar transistor

Used for DIY or robots

Large DC voltage gain 100 dB

Value 100k ohm Adjustment Type Single Turn Tolerance 30 % Type Preset Potentiometer- Trimpot Maximum Operating Voltage 50V DC Rotational  life 20 Cycles

thanks to an upgraded USB/LAN chip

LM386 Low Voltage Audio Amplifier IC KCD4 It is a power transistorThe LM386 is power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200. The inputs are ground referenced while the output automatically biases to one half the supply voltage. The quiescent power drain is only 24 mW when operating from a 6 V supply,