High sensitivity GPS receiver; 1/100 second resolution chronograph * Current/average speed in MPH or Km/h; 100 lap data memory storage * Current/average pace in MPH or Km/h;world time (106 cities in all time zones) * Current/total calories burned; USB rechargeable lithium-ion battery * Includes USB charger;lithium ion batterry provides 8 hour Satellite continuous connectivity and 3-4 weeks without satellite connectivity.