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 o 60 feet. Your distance measurer transmits ultrasonic waves to a point you want to measure. Afterwards, it measures the time taken by the waves to reflect and then calculates and re-transcribes the distance. Portable digital laser distance meter with high precision and wide measurement range. Mini size and handheld design, portable and convenient. Large LCD display, give you a clear view. Type: Ultrasonic Distance Meter Power Supply: 1 x 9V Alkaline Battery (Battery not Included) Measure Distance From 1.5 Feet to 60 Feet.( about 0.5 to 18 Meters) Frequency: 40kHz (Ultrasonic Pickup) Resolution 0.01M or 1/2 Inch. Working Temperature 32 F to 109.4 F Size: 155mm x 75mm x 45mm/6.1" x 2.93" x 1.76" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Ultrasonic Distance Meter