1、Transistor's function is to amplify the weak signal into an electrical signal with a large amplitude value, and also as a non-contact switch. 2、The set includes 18 kinds of transistor to meet your different needs. 3、High durability and stability for better using performance. 4、All of these transistor are integrated in a box,convenient to access and storage. 5、Transistor is one of the basic components of semiconductors, with current amplification, is the core component of electronic circuits. Features: Transistor's function is to amplify the weak signal into an electrical signal with a large amplitude value, and also as a non-contact switch. The set includes 18 kinds of transistor to meet your different needs. All of these transistor are integrated in a box,convenient to access and storage. High durability and stability for better using performance. Transistor is one of the basic components of semiconductors, with current amplification, is the core component of electronic circuits. Specification: Type: Transistor Package List: 20*S9012 Transistor 20*S9013 Transistor 20*S9014 Transistor 20*S9015 Transistor 20*S9018 Transistor 20*S8050 Transistor 20*S8550 Transistor 20*2N5551 Transistor 20*2N5401 Transistor 20*2N3904 Transistor 20*2N3906 Transistor 20*2N2222 Transistor 20*C1815 Transistor 20*A1015 Transistor 20*A42 Transistor 20*A92 Transistor 20*C945 Transistor 20*A733 Transistor