Button latches when pressed, twist to release. The switches are structured compactly and operated quickly and gently. For emergency stop in industry with the conspicuous red mushroom cap. Item Name : Emergency Stop Push Switch; Type : Red Mushroom Cap; Input Voltage : 250V AC Input Current : 3A AC; Output Voltage : 30V DC; Output Current : 5A DC Button Color : Red; Button Diameter : 2.34cm/0.9"; Size : 4.5 x 2.34cm/1.8" x 0.9"(L*D) Mounting Thead Hole Diameter : 15.5mm/0.6"; Material : Plastic and Metal Weight : 10g; Package Content : 1 x Emergency Stop Switch Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.