QMseller 15PCS DC 12V Wired Connector Active Electronic Buzzer 85dB

bnafes 15PCS Buzzer DC 3-12V Wired Connector Active Electronic Buzzer 85dB

VWEICYY 9V Battery Connector,10 PCS T-Type 9 Volt Buckle Connector Hard Plastic Shell Used in Student Experiment,or Other Equipment with Battery(T-Type, 10PCS)

Alligator Clips Electrical, 20PCS Preminum Test Leads with Crocodile Clips, 5 Colors Jumper Wires Kit with Testing Probes for Electrical Testing with Dual Ended Insulators for Circuit Connection