Size(inner perimeter) 150mm-190mm(smal l) &195mm-210mm(Larger)
Display OLED
Button Touch button
Data storage 30 days
Minute-data storage 7 days
Battery type Lithium-ion polymer, 70mAH
Battery life 6-15days
Water resistant IP69(Dive and swim under water 3m)
Operating temperature -10° to 45° C
Storage temperature -20° to 70° C
Weight 20g
Charger Clip-on charger - 5V (USB)
Mobile Software All softwares are developed by ourselves
Connectivity Bluetooth Smart 4.0 LE
Mobile Available for iOS (iPhone 4S and iPad 3, laters), Android 4.3 at least