Specification: It is a perfect tool to quickly know the distance, area, and volume of a room. It can measure distances in a straight line from 1.5 feet to 60 feet. The distance measurer transmits ultrasonic waves to a target point. It then measures the time taken for the waves to reflect back and calculates the distance. Portable digital ultrasonic distance meter with high precision and wide measurement range. Mini size and handheld design, portable and convenient. Large LCD display provides a clear view. Type: Ultrasonic Distance Meter Power Supply: 1 x 9V Alkaline Battery (Battery not included) Measure Distance: 1.5 Feet to 60 Feet (approximately 0.5 to 18 Meters) Frequency: 40kHz (Ultrasonic Pickup) Resolution: 0.01M or 1/2 Inch Working Temperature: 32F to 109.4F Size: 155mm x 75mm x 45mm / 6.1" x 2.93" x 1.76" (Approx.) Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Please allow slight dimensional differences due to manual measurement variations. Package Includes: 1 x Ultrasonic Distance Meter