Specification:
Large
69mm W × 43mm H (inner)
81mm W × 56mm H (outer)
Perimeter distance: 180mm (inner), 236mm (outer)
23gm
Sensor & Interface
Precision motion sensor
Single push-button interface
Vibrating motor for notifications
Dual LEDs
Software
Compatible devices
iOS 5.1 or greater
Android 4.0 (Ice Cream Sandwich) or later
See full list of compatible devices
Materials & Care
Medical-Grade, Hypoallergenic TPU rubber
Power & Battery
Lithium-ion polymer battery
Up to 10 days of use between charges
USB charging cable—fully charges in 80 minutes