Emergency stop push button Locking switch. Turn clockwise to turn on Contact Type: 1 Normally Open 1 Normally Polar: DPST Maximum Voltage: 660V Works perfectly with 220 volts and 110 volts Terminal: 4 Button Diameter: 40mm Color: Red Yellow Black Material: ABS Size: 77.6 * 71 * 65mm Package Contents: 10 x Emergency Stop Switch 10 x Waterproof Control Box 10 x Emergency Signs Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.