Features:
One button function- starts, stops and returns to zero by consecutive crown depressions.
The movement contains 13 gemstones, it can maintain normal operation in the -10 to +40 temperature range.
Durable, dust, water, shock and corrosion resistant.
The watch machine adopts stainless steel spring, single metal light balance wheel, nickel base alloy hairspring and kelleg vertical mechanism.

Specifications:
Item type: mechanical stopwatch 
Material: metal
Color: silver
Resolution ratio: 1/10s
Minute hand: 15 points/circle
Second hand: 30 seconds/circle
Continuous travel time: 6 hours
Size: about 50 x 68 x 16mm

Package includes: 
1pc x mechanical stopwatch 
1pc x storage box
1pc x rope

Notes: 
Transition: 1cm=10mm=0.39inch 
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 
2. Please allow 1-3cm measuring deviation due to manual measurement.