Whether working or completing DIY home renovations, this vernier caliper will increase the reliability of your measurements, reducing human estimation error, and giving more accurate results. Displays mm and inches electronically through the LCD large screen display, showing precise measurements - read to 0.1mm/0.01inch. Simply place an object in the anti-scratch, carbon fibre 'external diameter' piece and the caliper will display a precise measurement for its' length or diameter. Available is also the internal diameter measurement, the ladder measurement, or the depth measurement tool. The measurement range is 0-150mm/0-6 inch. Powering on is easy with the simple ON/OFF switch. Powers via 1 cell LR44/SR44 battery, which isn't included in the purchase.