The TRASENSE I8 has Bluetooth and IP65 waterproof and some sports features such pedometer,heart rate monitor as well the powerfull battery that consumes less power and can generally standby for 20 days.
Bluetooth Version: Bluetooth 4.0
IP rating: IP65
Screen resolution: 96 x 32
Screen size: 0.86 inch
People: Female table,Male table
Compatability: Android 4.4 above and iOS 8.0 or above
Battery Capacity: 120mAh
Band material: Silicone
The smartband is available on Gearbest and it's costs $25.23.