Pricing for the GPD Pocket 4 starts at $829 for the model with the 8840U CPU, 16GB of RAM ... An RS232 port is available for $14, a single-port KVM for $48, and a 4G LTE expansion module for ...

but this method causes the main KVM to lose the use of one CPU port for each added switch. By equipping the Matrix KVM unit with daisy-chain ports, none of the CPU ports are ever lost to cascading.