Model: DS-228/428 (3A/125VAC 1.5A/250VAC)Type: Self-locking (with lock)/ResetInstallation port diameter: 12MMHeight: 29.8MMBipedal spacing: 6.25MMFoot width: 0.2MM thick: 0.6MMMomentary: press the button to power on, release the button to power offLocking: press the button once to power on, and then press the button again to power off