This sophisticated hand-held instrument detects lightening as far as 40 miles away and ranges its approach, telling you if a storm is moving towards, away, or parallel to your position.

Features:

• Audible warning tone alerts you when lightning approaches
• LED distance indicators tell you how far away the storm is
• Powered by two 9V batteries
• Permanently install with the wall mounting bracket(#01991) and AC adapter(#01990).