Smart Bilateral (2 direction) Distance Meter increases efficiency by reducing walking back and forth during project or kneeling on the ground. Distance, Continuous Measurement, Pythagorean , Length, Volume, Area. transmit and receive mode. Ultra-Compact Design, one handed operation, Easy to Read Backlit LCD, and Long-Lasting Rechargeable Battery. IPX4 rated to withstand tough working environments. Using Aspherical High Transmittance Lenses, the 2 Directional measures up to 40m with an 2.0mm (0.08 in) precision. Measures in both metric and imperial (cm, inches, meters, feet), switch between bilateral or single mode for fast readings in rooms, buildings, warehouses, construction site, etc. Colour:As shown Material:Aluminum alloy Package Contents: 1 x measurement tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.