Tri-State1 via eBay offers the Fitbit Charge HR Wireless Activity Wristband in Black or Blue, model no. FB405, for $99.99 with free shipping That's the lowest total price we could find by $25, although we saw it for $20 less last week. Features include continuous heart rate monitoring, step-, distance-, sleep-, and calorie-tracking, time and date display, and wireless sync with supported computers and smartphones.