This part is a miniature AT or BT cut strip crystal units with a low profile package.It is with resistance weld.49SB series is with lower height of less than 2.55mm.It is the Electronic parts for frequency control, it is widely used in home appliance (such as TV, telephone, toy etc.)

It costs low and has wide frequency range and excellent aging.

If you have any interesting, pls contact me and kindly advise the frequncy, operating temperature the load capacitance and the insulator resistance.I will give you the most competitive price in China and with high quality.