Designed to provide long life, contactless switching - This sealed Push Button Switch is able to withstand harsh environments. OTTO HP7 Hall Effect Push Buttons are perfect for repeated 'jogging', KEY FEATURES • 10 Million Cycles • Sealed: IP64 • Choice of Termination Styles & Caps The OTTO Hall Effect Push Button Switch (HP7-DF23321) has a flush dome switch, with high momentary action - Ideal for material handling equipment.