The Piko Button Dual is a durable, 2 button switch.from Finland.  

Choose from two sizes:

• Small (just under 3 cm diameter), with one red switch, the other blue.
• Medium (just under 5 cm diameter), with one green switch and one orange.

When we ran across these switches, we were immediately impressed by their thoughtful design.  To say they're shock and cold resistant is not doing them justice - we've stomped on them and they still keep working. 

These are set to standard activation level of (125g). 

• Dimensions: 13mm x 29mm or 13mm x 49mm.
• Sensitive response with just 0.8mm activation travel.
• Auditory and tactile feedback.
• Comes with Y cable adapter