Sure-Wave Hands-Free Switch is an active infrared device designed for use with an automatic door operator or door-locking product (such as an electric door strike or magnetic lock) where physical contact with a switch poses a health risk or is simply inconvenient. FEATURES• Adjustable operating range 1"-26" • Adjustable time delay 1–5 seconds • Fail-safe/non-fail-safe selectable • On-board LED for ease of set-up (selectable on/off) • Super-fast activation response <100ms • Excellent performance in all lighting conditions • Fully shielded against EMI, line voltage spikes and noise • 12/24V AC/DC operation • Heavy duty 5 amp relay, for use with all automatic operators and electrified locks • ROHS compliant