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 15 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: 40*2N2222 Transistor 40*2N3904 Transistor 40*2N3906 Transistor 40*2N5401 Transistor 40*2N5551 Transistor 40*A1015 Transistor 40*C1815 Transistor 40*C945 Transistor 40*S8050 Transistor 40*S8550 Transistor 40*S9012 Transistor 40*S9013 Transistor 40*S9014 Transistor 40*S9015 Transistor 40*S9018 Transistor 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 15 kinds of Transistor to meet your different needs. 3、All of these transistor are integrated in a box,convenient to access and storage. 4、High durability and stability for better using performance. 5、Transistor is one of the basic components of semiconductors, with current amplification, is the core component of electronic circuits.