Main functions: Motion recording (step count, distance, calorie calculation), message push, information storage, heart rate monitoring, sleep monitoring, blood pressure measurement, stopwatch, full font language, color display. Specifications: APP:YOHO SPORTS Compatible systems: Android 5.0 (above), IOS8.0 (inclusive) and above Screen size: 0.96 inches Bluetooth: Bluetooth 4.0 Capacity: 80mAh Charging method: USB Waterproof rating: IP67 Charging time: about 2H Life time: Use 2-3 days, standby 5 days Wristband size: total length 250MM, adjustable length 120-200MM Appearance Material: Body: Plastic Wristband: Thermoplastic Elastomer + Stainless Steel APP Supports 14 languages: Chinese, English, Japanese, Turkish, Spanish, German, Russian, Finnish, Arabic, French, Malay, Indonesian, Korean, Portuguese Language supported by news content: Chinese, English Products include: 1 *Smart bracelet 1 * User Manual USB direct charging Questions You may concern Q:Will I receive box? A:Yes,you will receive 115 plus Smart Bracelet with original Box. Q: How to charging the bracelet? It need the charger? A: The bracelet is not need the charger,Please take off the watch from wristband (Please carefully pull the host out) then charge it with using usb. If there is no reaction after charging, please try to charge in the direction of the change, and then turn it on after a period of time. Q:Is it accurate of heart rate,blood pressure or other function?? A:To be honest, we can't promsie its 100% accurate, it's only a sports and health assitant,Could't be regard as Medical Equipments,We suggest you buy professional Medical Device if needed.