Please refer to this article on how to determine the Hardware Revision of your Balance.
Balance 20:
HW1: 100Mbps
HW2: 150Mbps
HW3: 150Mbps
HW4: 150Mbps
HW5: 150Mbps
HW6: 150Mbps
HW7: 150Mbps
Balance 20X:
HW1: 900Mbps
Balance 30/50:
HW1: 100Mbps
HW2: 150Mbps
Balance 30 LTE:
HW1: 150Mbps
HW2: 150Mbps
HW3: 200Mbps (Upgraded to 400Mbps)
Balance 30 PRO:
HW1: 400Mbps
Balance One:
HW1: 600Mbps
HW2: 600Mbps
HW3: 600Mbps
Balance Two:
HW1: 1Gbps
Balance 210/310:
HW1: 50Mbps
HW2: 50Mbps
HW3: 100Mbps
HW4: 200Mbps (Upgraded to 350Mbps)
HW5: 350Mbps (Balance 210)
Balance 310X:
HW1: 2.5Gbps
Balance 305:
HW1: 200Mbps
HW2: 1Gbps
Balance 380:
HW1: 170Mbps
HW2: 170Mbps
HW3: 170Mbps
HW4: 170Mbps
HW5: 200Mbps
HW6: 1Gbps
Balance 380X:
HW1: 3Gbps
Balance 580:
HW1: 400Mbps
HW2: 1.5Gbps
Balance 580X:
HW1: 4Gbps
Balance 710:
HW1: 350Mbps
HW2: 800Mbps
HW3: 2.5Gbps
Balance 1350:
HW1: 1.5Gbps
HW2: 5Gbps
Balance 2500:
HW1: 8Gbps
SDX:
HW1: 12Gbps
HW2: 12Gbps
SDX PRO:
HW1: 24Gbps
EPX:
HW1: 30Gbps