In April 2015, the UP2 was introduced as a watch-clasp style bracelet unit with additional features from the UP24. It was later relaunched in September 2015 with a hook and loop design after critical reviews by customers. The new features on the UP2 include Smart Alarm, Idle Alert, and Automatic Sleep Detection. The Smart Alarm feature allows the user to be gently awakened with a vibration on the device when the unit detects the optimal moment within 30 minutes of a preset time. Along with the UP3 & UP4, the UP2 was designed with more attention to fashion, offering several available colors, depending on the model. The 2.5mm charging dongle was replaced with a USB powered magnetic connector