The B1209XT- W2R2 from MORNSUN is a DC to DC Converter with Input Voltage 10.8 to 13.2 V, Output Voltage 1 9 V, Output Current 1 3 to 28 mA, Output Power 250 mW, Operating Temperature -40 to 105 Degree C. Tags: Through Hole, Buck/Step down. More details for B1209XT- W2R2 can be seen below.