erniceThe R433 with SAW Resonators D11 RoHS is a surface acoustic wave (SAW) resonator device made by Sfernice. It is made of aluminum nitride and uses variable capacitors to control the resonance frequency of the device. The RoHS designation stands for “Restriction of hazardous substances” and indicates that the device is compliant with strict European Union legislation reducing the use of certain hazardous material (leaded solder, mercury, etc.) in electronic products. The SAW resonator offers a high resonant Q factor and excellent frequency stability. It is used in frequencies from 500MHz to 1650MHz and is ideal for communication systems and high frequency oscillators.