Activated by pressing down on the top of the switch with a feather light touch just 0.4 ounces (10 grams) of pressure required! Perfect for people with disabilities that have limited movement. The Micro Light Switch has a threaded insert on the bottom for mounting with a 4/40 screw (available at electronics stores). Active area is 0.5 x 0.75 Auditory and tactile feedback. Switch includes Red, Blue, Yellow and Green stickers.