The CJ13-120002020B20 with SMD3225-4P Crystals ROHS is an electronic component manufactured by Changjing Electronics Technology. It is an oscillator module, which is used to generate an oscillating electrical signal that can be used as an input or output for circuits requiring an oscillating signal. The oscillator has a 3225-4 pin SMD-style package, providing an easily mountable form factor. Its frequency range is 12MHz, and it has a high frequency accuracy of ±20ppm, making it suitable for use in applications requiring precise frequency control. It also has RoHS certification, making it safe for use in industrial and consumer electronic products.