5G EM9190 (sub6+C) xPAK for FZ-55 Mk3 Left Expansion Area. Includes 4FF SIM slot. Supports 4G (LTE, LTE-A) and 5G (Sub6, C-band) on ATT, FirstNet and Verizon. Only compatible with Mk3 units, adds a 1.1" bump out on the left side, does not support antenna pass through, requires screws when installed (provided) and requires software update(s)/reboot(s) when installed the initial time as a field upgrade. Contact your Panasonic representative for details.