Alarm circuit with buzzer 5v (raspberry pi 2 model b+)

This is a circuit with alarm with a signal of 5v for raspberry pi

Materials:

-Buzzer 5v

-resistors 10k ohm

-Battery pack to 4 (AAA) - voltage: 4.8

-Led Diode

-Jumper Headers (3)

-Raspberry pi 2 model b+

-Transistor 2N2222 NPN