TOP 8051 USB Programmer 10 Pin Female Connector with Wire It's an optical sensor that

It's an optical sensor that measures the absorbance of pulsating blood through a photodetector after emitting two wavelengths of light from two LEDs - a red and an infrared one

These are Carbon Film Resistor with a value of 100 ohm 1/4W and tolerance of ±5%

Resistance Value 15 ohm Color Code Brown

which are critical for high-frequency analog sections

TOP 8051 USB Programmer 10 Pin Female Connector with Wire It's an optical sensor that8051 USB Programmer is used for the 8051 micro controller family. It is a very powerful and low cost programmer. It is powered by a USB and does not need any external power source. It comes with a user friendly GUI and power and status indicator LEDs. Download CD from here Specification Model TOP8051 Batch 2020 Power Self Powered USB Power LED RED Status LED GREEN Supports 8 Pin, 28 Pin, 40 Pin ICs