The Stanley 77-176 DWM30 digital measuring wheel allows for Bi-directional measurement measures in either direction and automatic conversion of units of measurement It can store up to 8 measurements in memory auto power off after 2 minutes of suspended use as well as a manual power off It has a heavy-duty metal folding handle and rubber grip folding wheel mount die cast aluminium wheel wear resistant rubber tread and a folding kick stand 1-77-176 CONSISTS OF Measuring Wheel Manual and Carry Bag Technical Specification Working Range - 999999 Metres or 999999 Feet Wheel Diameter - 254mm Working Environment - Built for exterior use Working Accuracy - ± 1 Typically Units of Measurement - Metres Centimetres Feet & Inches Wheel Mount - Folding Wheel mount included Batteries - 3 x AAA Batteries Battery Life - Up to 50 hours of intermittent use Build Standard - Rugged construction for outside use Warranty - 12 Months