Newegg offers the Samsung S Health Activity Tracker, model no. EI-AN900AZESTA, for $20. This $20 mail-in rebate drops that to $0. With free shipping, that's $10 under our mention from a month ago and the lowest total price we've seen. (It's also a current low by $50.) It features call and text message notification, step and calorie tracking, and sleep monitoring. The tracker syncs with the S Health App. It's compatible with Samsung devices with Android 4.3 or higher. Deal ends January 31.

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