SINOCMP 0-6"/150mm Carbon Fibre Digital Electronic Caliper Economy Model SINOCMP 0-6"/150mm Digital Electronic Caliper Measuring Range: 0-150mm/0-6" Resolution: 0.01mm/0.001" Material: Made from extra strong carbon fibre composite Zero setting in any position ;Metric, decimal inch display Power: SR44/LR44 1.5V Battery(included) with an extra back-up battery.