Specifications: Quantity: 100 pcs/pack 20mA Polarity: Anode (long part) | ? Negative (short part) Applications: Electronic equipment Photo Transistor Communication equipment IR beam sensor IR remote control DIY PCB circuit Arduino Raspberry Pi hobby science experiment breadboard Specifications: Quantity: 100 pcs/pack 20 mA polarity: Anode (long part) Negative (short part) Applications: Electronic photo transistor communication equipment IR beam sensor infrared remote control DIY PCB circuit Arduino Raspberry Pi hobby science experiments