Features:
High-definition Touch Screen
Adopt high-definition full-color 1.14'' TFT screen, brings superior HD image quality experience. Single touch, smoother operation.
Health Monitoring
The smart bracelet provides heart rate monitoring, blood pressure and blood oxygen monitoring. It allows you to keep track of your health and enjoy a healthier life. 
Multiple Sports Modes
Multiple sports modes like walking running provide real-time data. The motion tracking is more accurate, sports data collection is more timely to set sports targets, help you to build a healthy lifestyle.
IP67 Waterproof
IP67 waterproof level, the bracelet can be worn when washing hands to meet your requirements of wearing anytime and anywhere.
Information Push
The bracelet can be synchronized with the mobile phone. When mobile phone has notifications such as incoming calls, SMS or wechat, even if it is placed in the bag, the bracelet will be reminded that you won't miss important informations. 
Sleep Monitoring
Monitor your sleep time and sleep quality in real time, help you to master your sleep state more intuitively.
USB Charging
Convenient and fast, 150mAh lithium polymer battery provides about 2 hours charging time and 15 hours standby time.

Specification:
Item name: Smart bracelet
Model: RD11
Color: Black/Red/Blue/Purple(optional)
Chipset: NRF52832
APP: DuoWear
Support OS: Android 4.4 and above, iOS 8.0 and above
Flash memory: 64Mbit
Screen type: TFT
Screen size: 1.14 inch
Resolution: 240*135
Touch type: Single touch
BT: BT4.0
WiFi: Not support
NFC: Not support
G-Sensor: Support
Gyroscope: Not support
GPS: Not support
Battery type: Lithium polymer
Battery capacity: 150mAh
Charging method: USB
Waterproof level: IP67
Charging time: About 2 hours
Working time: About 5-7 days
Standby time: About 15 days
Wristband size: Total length: 223.5mm, adjustable length: 120-200mm
Appearance material: ABS(body), TPU+ stainless steel(wristband)
Item weight: Approx.25g /0.88oz
Package size: 8.5 * 8.5 * 3.6cm /3.35 * 3.35 * 1.42in(L * W * H)
Package weight: 66g /2.33oz