Pinless Ball Sensor: Uses a spherical probe to detect moisture up to 40 mm (1.57') below surfaces without pinholes. Scan walls, floors, or wood in RVs with zero damage Fast, Accurate Results: Get quick moisture readings on the large 2.4' LCD. Advanced calibration provides reliable ±2.5% accuracy to catch even slight moisture changes Smart Audio-Visual Alerts: Set your own moisture threshold tri-color LEDs flash and it beeps when levels exceed your limit ensuring you never miss hidden dampness Built-in Flashlight & Auto-Off: The integrated flashlight lights up dark areas,and auto shut-off after 30 min preserves battery life.Plus, 3 AAA batteries are included Wide Applications: Moisture meter for walls, wood, concrete, and more.Use it as a basement moisture detector, check floors before installation, or inspect RVs for water damage