NE556 Dual Timer IC Mini Servo as the name implies

as the name implies

Time Delay Retrigger: When it receives the second induction signal within the first induction

The 120E SMD Resistor is a conventional thick film chip resistor and is a type of surface-mount resistor

Brown for these 200E resistors

NE556 Dual Timer IC Mini Servo as the name impliesIn one IC package, the 556 IC contains two distinct and independent timer circuits. It works in astable or monostable mode, and timing or delay can be modified with an external resistor capacitor combination, just like the 555 timer IC. The NE556 dual monolithic timing circuit is a highly stable controller and capable of producing accurate time delays or oscillations. Features Low Turn off Time Max. Operating Frequency >500kHz Tuning from microseconds