Features: 1) Three memories for length, width, and height 2) Adds and subtracts between the stored data 3) One touch of calculation of volume and area 4) Measures from 0.6 15m / 2-50ft 5) Meter of feet conversion 6) Accuracy: +/-0.5%+1digit 7) Auto power off 8) Laser pointer 9) Low battery indication 10) One 9V battery required