SGPD30C is a high-speed and high-sensitivity photosensitive diode produced by Shenzhen Shuguang Electronic Technology Co., Ltd. It has a lower junction capacitance, a miniaturized SMT structure, a transparent epoxy package, and is used for a long time without measurement parameter attenuation. It can be used for a variety of different purposes, such as sound transmission, video recording, remote control, measurement, and control.