The 1NM27000C33YC with SMD Oscillators(XO) SMD-2016_4P RoHS is a surface-mount oscillator that is made by SJK. The oscillator is RoHS compliant, meaning that it is free of hazardous materials and is safe for use. The device is 16mm by 5mm and has a frequency of 27.000 MHz. It works as an oscillator, sending out a signal at a specific frequency in order to control timing and synchronization functions in electronic circuits. It can be used for a variety of applications, including radio communications, medical imaging, and computer timing.