Records Sports Data Daytime and Sleeping Data in the Night to Guide Healthy Living. .49 inch OLED Screen Display Shows the Steps, Calories, Distance, Time, Sleep quality. Host Syncs via Wireless Bluetooth 4.0 or Via USB to Connect to PC. Wirelessly Uploads your Data to Your Phone or Computer,so you Can Gain Deeper Insight into Your Daily or Monthly Fitness Sleep Levels with Free Online Graphs and Charts. Waterproof IP55. Rechargeable Lithium Battery. Sleeping Monitor, Pedometer, Distance Recorder. Compatible with All Devices Enabled with Bluetooth. No Battery or External Power Required, Recharges When Plugged Into a Computer. LCD Status Indicator.