Fitbit today announced it has started selling the Surge and Charge HR, the company's latest activity trackers. Unveiled in October, the two wearables join the Charge and Flex in Fitbit's popular fitness band lineup.

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Fitbit Surge

Advertised as a Fitness "Super Watch", the Surge includes a continuous heart rate monitor and an onboard GPS module for distance, route, and elevation tracking. Similar to other Fitbit wearables, the Surge also offers sleep monitoring, silent alarms, and all-day multi-sport activity tracking. Besides activity tracking, the Surge displays iOS notifications and provides music playback control via the touchscreen LCD display.

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Fitbit Charge HR

Alongside the Surge, Fitbit is also shipping the Charge HR, a version of the Charge fitness band that adds a continuous heart rate monitor. The Charge HR supports the standard all-day activity and sleep tracking available in Fitbit's line of fitness bands. It also supports Caller ID on its monochrome OLED display.

Both the Surge and the Charge HR are available to order today on Fitbit's online storefront for $249 and $149, respectively. Fitbit has so far opted not to support Apple's Health ecosystem introduced with iOS 8, but there are several intermediary solutions to allow users to move Fitbit data into the Health app.