Specifications:
Model: Huami
Color: Red, Black(Optional)
Material: Ceramic
Charge/Data Port: Specilaised USB charging port
Bluetooth Version: 4.0
Battery Capacity: 280mAh
(Theoretically Standby Time: 5 days, Standby time will depend on the actual using situation.)
Product Size: Approx. 22 * 2 * 2cm / 8.6 * 0.78 * 0.78in
Product Weight Approx. 55g / 1.92oz
Package Size Approx. 12 * 10 * 5cm / 4.68 * 3.9 * 1.95in
Package Weight Approx. 234g / 8.19oz

Note:
Item color may show slight aberration due to different shooting light and monitor display.
IP67: In case of short - time immersion under 1m water, at normal temperature, under normal pressure;
Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
which means you can wear it when you wash hands/faces, or take shower. While IP67 is not totally waterproof, do not soak it in deep water for too long time.
Heart rate monitoring is influenced by various factors like tensions, drugs, etc.

Package lists:
1 * Smart Watch
1 * Charging Pad
1 * USB Cable
1 * User Manual