The PLL1919BQ-SS-433MHz-443MHz-A from Dynamic Engineers is a Frequency Synthesizer with Frequency 433 to 443 MHz, Step Size 10 KHz, Reference Frequency 5 to 100 MHz, Output Power 1 to 5 dBm, Input Power -5 to 5 dBm (Reference). Tags: Surface Mount, PLL Frequency Synthesizer. More details for PLL1919BQ-SS-433MHz-443MHz-A can be seen below.