The M383-1350M4 from Microsaw is a Delay Line with Frequency 881.25 to 1758.75 MHz / 941.25 to 1818.75 MHz, Center Frequency 1320 to 1380 MHz, Group Delay 110 nS, Insertion Loss 33.29 dB, Operating Temperature -55 to 85 Degree C. Tags: Surface Mount, Fixed. More details for M383-1350M4 can be seen below.