From the detector comes a pleasant sounding chime every time a person enters its detection area.

This means, that you will never hear a false alarm due to sunlight, car headlights or reflections. Designed with state of the art electronic components to operate under the most demanding circumstances, the SL-40 is ideal for monitoring small office and shop entrances.

• Powered by 9 volt battery
• Long battery life circuit design
• Fully automatic, no alignment required
• Ceiling, above door, or side mounting
• No wires, easy installation
• Welcomes with a pleasant sounding chime
• Prevents unannounced entry
• Helps control theft
• One year warranty
• Low cost