The ProLaser 4 from KustomSignals is part of the ProLaser family of lidar speed measurement devices. With advanced target acquisition time and target range, the performance of the ProLaser 4 is reliable. The unit minimizes user's fatigue with advanced balance. Its features include high-contrast OLED graphical display, simple user interface, ruggedized pistol grip, and selectable aiming reticles. The unit operates in all weather conditions and has a "poor weather" mode for enhanced capability. The ProLaser 4 operates on four AA batteries and comes with eight rechargeable batteries and a charging station.