Main Features:
- Time display
- Calories measurement
- Distance measurement
- Sleep tracking
- Alarm setting
- 7 days data saving
- Water resistant: IP57
- Bluetooth: BT 4.0
- Support system: IOS 7.0 and above， Android 4.3 and above
- Processor: Nordic NRF51822 ARM Cortex-M0 32bit
- Flash memory: 256KB embedded flash
- RAM memory: 16KB RAM
- MEMS: Sensor LIS3DSH
- MOTOR: Y0408L
- LED display: 21pcs
If you want to know more， please read the use's manual

Specifications
Hardware
Brand: OAXIS
Bluetooth version: Bluetooth 4.0
Waterproof: YES
Screen
Screen: LED
Battery
Battery type: Lithium polymer batteries
Battery capacity: 50mAh
Standby time: 10-15 days
General
People: Unisex watch
Charging interface : Mirco USB
Special Features
Functions: Calorie burns measurement， Distance measurement， Sleep monitoring
Dial and Band
Shape of the dial: Rectangle
Case material: Zinc Alloy
Band material: TPU
Features
Language: English
Available color: Black， White， Red， Blue， Green
Weight and Size
The dial thickness: 0.8 cm / 0.3 inches
The dial diameter: 1.3 cm / 0.5 inches
The band width: 1.3 cm / 0.5 inches
Product size (L x W x H) : 25 x 1.3 x 0.8 cm / 9.8 x 0.5 x 0.3 inches
Package size (L x W x H): 12.1 x 9.6 x 7.3 cm
Product weight: 0.016 kg
Package weight: 0.197 kg
Package contents
Package contents: 1 x OAXIS Star 21 Smart Watch， 1 x Manual， 1 x Charging Cable， 1 x Box




IPXX Rating Chart
IP Code The IP Code (or International Protection Rating， sometimes also interpreted as Ingress Protection Rating*) consists of the letters IP followed by two digits and an optional letter. As defined in international standard IEC 60529， it classifies the degrees of protection provided against the intrusion of solid objects (including body parts like hands and fingers)， dust， accidental contact， and water in electrical enclosures. The standard aims to provide users more detailed information than vague marketing terms such as waterproof.The digits (characteristic numerals) indicate conformity with the conditions summarized in the tables below. For example， an electrical socket rated IP22 is protected against insertion of fingers and will not be damaged or become unsafe during a specified test in which it is exposed to vertically or nearly vertically dripping water. IP22 or 2X are typical minimum requirements for the design of electrical accessories for indoor use.