Specification: Color: Black,Pink,Blue,Brown. Bluetooth Version: BT 4.0. Compatible OS: Android 4.4 or above , iOS 8.0 or above. Operating Mode: Full Touch. APP Name: H Band. App Language: Chinese,Traditional Chinese,English,Japanese,Korean,German,Russian,Spanish,Italian, French,Vietnamese,Portuguese,Persian. Waterproof:...

Specification:  Screen: LED Display.   Button: Touch Button.   Time Display: 24-hour Display Mode.   Temperature Measurement Method: Contact Film Heart Conduction.    Temperature Measurement Method: 30℃-45℃.   Battery Capacity: 55mAh.   Standby Time: about 90...

Description:  High Speed Steel Black Oxide Reduced Shank Drill Bit with 1/2 inch Shank Twist Drill Bit.  Drills are precision ground to maintain a high degree of concentricity between shank...

Specification: Color: nRF52832. Bluetooth Version: BT 4.0. Compatible OS: Android 4.4 or above , iOS 8.0 or above. Operating Mode: Touch Screen. APP Name: H Band. App Language: English,French,German,Italian,Japanese,Korean,Portuguese,Russian,Simplified Chinese,Spanish,Traditional...

Specification:  Color: Black, Blue.  Chip: NRF52832.  Bluetooth Version: BT 5.0.  Compatible OS: Android 4.4 or above , iOS 8.0 or above.  Operating Mode: Touch Key.  APP Name: KakaFit.  App Language:...

Specification:  Color: Balck&Black, Black&Silver, Pink.  Bluetooth Version: BT 4.0.  Compatible OS: Android 4.4 or above , iOS 8.0 or above.  Operating Mode: Touch Key.  APP Name: Happy sports.  App Language:...

Specification:  Color: Black,Blue,Pink.  Bluetooth Version: BT 4.0 or above.  Compatible OS: Android 4.0 or above , iOS 9.0 or above.  Operating Mode: Single Touch.  APP Name: Dafit.  App Language: English,Korean,German,Spanish,Japanese,French,Italian,Russian,Portuguese,Arabic. ...

According to the research of scientists, the effective concentration time of human beings at work and study is 25 minutes. It takes 5 minutes to rest deeply after focusing on...