The Pebble 2 comes in two main variants: a HR (heart rate) variant whose main distinguishing feature is an optical heart rate monitor on the back of the watch, and a SE (standard edition) variant without a heart rate monitor. Otherwise, the two models are very similar. The Pebble 2 HR, in addition, has 5 different color options: charcoal, white, aqua, flame, and lime, while the Pebble 2 SE was only made in charcoal.
The Pebble 2 HR was originally priced at $129 while the Pebble 2 was priced at $99 originally. The Pebble 2, like all other Pebbles with a rectangular screen, has a display size of 144x168 pixels, has 8 MB of storage, a 100 hz. Cortex-M4 processor, a microphone intended for Voice replies, an always-on B/W backlit e-ink display, 4 navigational buttons, an accelerometer, and a smart accessory port for transmitting data.