The GS12 from GEMS Navigation is a Power Divider with Frequency 1.164 to 1.616 GHz / 1557.5 to 1587.5 MHz, Isolation 30 dB, Input Power 0.001 to 1 W, P1dB -5 to 0 dBm, Amplitude Balance 0.5 dB. Tags: Module With Connectors. More details for GS12 can be seen below.