Contains usefull IC types such as: Photocouplers, , Osciallators, Dual Opamps, Opamps, Comperators, Audio Amplifiers, Processors, Current Mode Controllers, Arrays, Voltage Charge Pumpcolour:blackMaterial:plasticPackage Contents:20 x PC817c, DIP-4, General Photocoupler2 x ICL7660s,Super Voltage Converter, Charge Pump20 x NE555, DIP-8, Timer, Pulse generation, Oscillator10 x LM358,DIP-8, Low Power Dual Operational Amplifier10 x LM324,DIP-14, Operational Amplifier10 x JRC4558,DIP-8, Dual Operational Amplifier10 x LM393,DIP-14, Low Offset Voltage Dual Comparator10 x LM339,DIP-8, Low Power Voltage Comparators5 x NE5532,DIP-8, Dual high-performance low-noise Operational Amplifier5 x LM386m,DIP-8, Low Power Audio Frequency Amplifier2 x TDA2030A,TO-220, Audio Amplifier in a Pentawatt Package5 x TDA2822D,DIP-8, Low Power Stereo Op Amplifier3 x PT2399,DIP-16, CMOS Audio Processor5 x UC3842AN,DIP-8, High Performance Current Mode Controller5 x UC3843AN,DIP-8, High Performance Current Mode Controller5 x ULN2003AN,DIP-16, Bipolar (BJT) Transistor Array 7 NPN 50V 500mA5 x ULN2803APG,DIP-18, Bipolar (BJT) Transistor Array 8 NPN 50V 500mA2 x DIP4 Socket7 x DIP8 Socket3 x DIP14 Socket3 x DIP16 Socket2 x DIP18 Socket1 x DIP8 - SOP8 Through Hole to SMD Conversion AdapterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.