Keep track of your fitness goals with the D18 Fitness Tracker with BP and HR Monitor Compatible with iOS and Android for easy tracking Multi-function watch supports HR, BP and blood oxygen monitoring IP65 waterproof design and multi-sport mode for more freedom Get automatic records on daily movement and calories Make sure you're getting your 20 winks with sleep monitoring function Made with ABS material Battery capactiyy: 170mAH 1.3" screen size Save 47% on the D18 Fitness Tracker with BP and HR Monitor for 16.99 pounds