The ATM1900D-VA20 from Radio Frequency Systems is a Tower Mount Amplifier with Frequency 1.85 to 1.99 GHz, Power 250 to 1600 W, IP3 25 dBm, Current 100 to 190 mA, Voltage 10 to 30 V. Tags: Module with Connectors. More details for ATM1900D-VA20 can be seen below.