our main product : quartz crystals( HC49U.HC49S, HC49S-SMD) , SMD Crystal( 3225, 4025, 6035, 7050) , Through hold oscillator, SMD TCXO SMD VCXO ceramic resonators ( filter, SMD) Saw filter. which are widely used in the field of wire and wireless telecommunication, RF remote controls TV sets, computers, etc