LeFun8482; Fit Bluetooth 4.0 IP57 Waterproof Smart Bracelet Sports Fitness Tracker Smart Wristband with Pedometers Incoming Calls/SMS notice Sleep Monitoring Anti-lost for Android and iPhone Smart Phone (Black) Two-way anti lost: Alarm when Wristband or Phone is out of range, or Send Alarm Signal to Wristband from within the App Bluetooth 4.0 enables Super Fast Data Sync and Stable connection; Vibration Wake Alarm and Multi Languages Support IMPORTANT NOTE: Please read the instructions provided in the 'Product Description' before buying this product  Various sports and fitness tracking: Steps and Distance Tracking, Fitness Goal, Calories Calculation and Sleep Monitoring, Task Alarm, Camera/Video Capture Remote Control Super-long 180 days standby time with USB charger port, easy to charge without cable with directly connecting to computer or USB charger IP57 Waterproof level, Slim, Comfortable and Easy to wear with Replaceable band