Features 1、This transistor is made of high quality electronic elements, durable for use. 2、40pcs transistor are enough for use. 3、8 type of transistor can meet your different needs. 4、Control the current and amplify a weak signal into a larger electrical signal. 5、It is the core element for the electronic circuit. Specification Description: The transistor is a semiconductor device that controls the current and is used to amplify a weak signal into a larger electrical signal. Also used as a contactless switch. Features: This transistor is made of high quality electronic elements, durable for use. 40pcs transistor are enough for use. 8 type of transistor can meet your different needs. Control the current and amplify a weak signal into a larger electrical signal. It is the core element for the electronic circuit. Specification: Model: 7805 7809 7812 7815 7905 7912 7915 LM317 Type: JFET The channel type: N channel Conduction mode: depletion mode Application: A/Broadband amplification Size: Approx. 28.8*10mm / 1.13*0.39inch Weight: 73g Quantity: 40pcs(5pcs each type, 8types in total) Package Included: 40 x Transistor Package List