Here is a close look at the common- versus differential-mode voltage and instrumentation amplifier (IA) topologies.

Blue: Supporting USB 3.0 SuperSpeed technology and above, blue ports identify a device capable of fast data transfer: up to 5 Gbps (that's 5,000 Mbps) -- a significant jump from previous generations.

Macworld At a glance Expert's Rating Pros ・Large battery capacity ・140W (PD 3.1) charging power ・300W max output ・280W input ...