The Piko Button Dual is a durable, 2 button switch
 
Two sizes:
Small (30mm/1.18in diameter) - colors vary
Medium (50mm/2in diameter) - colors vary
 
Specifications
Dimensions: 13mm x 29mm (small)  or 13mm x 49mm (medium) 
Sensitive response with just 0.8mm activation travel.
Auditory and tactile feedback.
Comes with Y cable adapter
Activation force: 125g (standard); 75g (light) and 250g (stiff) available upon request
Mounting options: Adhesive / Velcro®
Activation area: 30 or 50mm
Auditory feedback: Click on activation
Tactile feedback: Yes
Visual feedback: No
Termination: 3.5mm stereo
Cable length: 150cm
Switch type: Push to make (Normally Open)
Battery: None