Seiko Astron GPS Solar World Time SSE111 Casio G-Shock Bluetooth Gravity Master GRB100GB-1A Using a built-in accelerometer to

Using a built-in accelerometer to measure daily steps taken and walking/running pace

Hand shift feature (manual or auto (during altitude

with a power reserve of approximately 70 hours

visibility

and solar charging can be used to power daily operations (except for pulse monitoring and GPS)

Seiko Astron GPS Solar World Time SSE111 Casio G-Shock Bluetooth Gravity Master GRB100GB-1A Using a built-in accelerometer toSeiko Astron GPS Solar World Time SSE111 Astron is the first watch to automatically recognize all time zones on Earth. With the touch of a single button, Astron adjusts to the correct local time everywhere on the planet.* Always accurate. Seiko Astron is accurate to one second every 100,000 years, thanks to the time signal it receives from the Atomic Clocks in each GPS satellite. Astron never stops. Astron receives all the power it needs from light