The Big Red switch provides a large 5-in/12.7-cm activation surface that activates with 5.5-oz/156-g of force. When activated, the user experiences tactile and auditory feedback. The Big Red switch is the best choice for individuals with visual impairments and/or physical disabilities that require a larger target area. Included are red, blue, yellow, and green interchangeable switch tops and a snap on clear symbol holder. This model MUST be plugged into device. It is NOT cordless.