50pcs/lot PD204-6C infrared receiver tube PIN photodiode wavelength 940nm photosensitive receiver tube 3mm billion light
https://www.vogueparade.com/shopping/EN/150412/1/1005003420843773/50pcslot-pd204-6c-infrared-receiver-tube-pin-photodiode-wavelength-940nm-photosensitive-receiver-tube-3mm-billion-light//