un, bubble shaped pedometer tracks the number of steps taken daily, and calculates calories burned and distance walked in miles/kilometers Built-in clip attaches the bubble-shaped pedometer to their waistband or belt for comfortable all-day tracking Translucent-colored pedometer is accented by white trim and is powered by solar or battery power Operates by solar power when it's available or by one button-cell battery (included) when it's not Auto shut-off helps conserve battery energy, but with reactivation, workout data continues right where it left off Color: White Power Source: Solar or Battery Power (button-cell battery included) Dimensions: 2' x 1.75' x 1.125' (D x W x H, Approx)