Rolatape RT412D Digital Measuring Wheels, Yellow Ergonomic handle with backlit digital display provides easy to read measurements at a glance Digital display measures to 1-inch, 1/100th-inch, and/or 1-centimeter increments Memory stores up to four measurement values that users can quickly recall Digital brake stops wheel measurement with a push of a button Auto shut-off saves battery life by turning unit off after three minutes of suspended operation. Batteries provides up to 30 hours of intermittent use