ITEM NAME:4Pcs DIY Kit Light-Control Sensor Switch Suite For DIY Electronic Trainning M&O Product Introduction: 1. Metal film resistor 1K 1 2. Metal film resistor 120K 1 3. S9013 2 4. Photoresistance 1 5. PCB 1 6. Package Included : 4 X DIY Kits.Product Introduction.