The 4000AT44A1800 from Johanson Technology is a Antenna with Frequency 3.1 to 4.9 GHz, Gain -3.5 to 2.7 dBi, Power 3 W, Operating Temperature -40 to 85 Degree C, Storage Temperature 5 to 85 Degree C. Tags: Ceramic, Chip. More details for 4000AT44A1800 can be seen below.