[. . . ] [. . . ] Ergo 720 Laser also provides an excellent laser engine that can track on a variety of surfaces better than an optical device, even on tricky polished or wood-grain surfaces. Moreover, the power consumption of Ergo 720 Laser is lower, and only one AA battery is needed. The ergonomic design fits comfortably in your hand and eases your working fatigue. The Ergo 720 Laser is designed for mobile users, and its cordless, compact size, power-saving, comes in a stylish shape. [. . . ] [. . . ]