Methods include waxing, sugaring, epilation devices, lasers, threading, intense pulsed light or electrology. For pulsed lasers and invisible wavelengths, other power limits apply. This system used pulsed laser beams with duration in range of picoseconds. Specialist treatments including laser and intense pulsed light skin surgery can also be used. Alternatively, the laser beam may be pulsed to decrease the amount of excessive heating. Usually, at least one of the lasers is pulsed. All modern ultrasound scanners use pulsed Doppler to measure velocity. Both continuous wave and pulsed systems are used. IPDA lidars can be either pulsed or CW and typically use two or more wavelengths. Both pulsed and continuous wave systems are being used. Higher precision can be achieved with pulsed waveforms. Shortwave diathermy can be applied in either continuous or pulsed mode. Proper cleaning can be achieved through physical scrubbing, sonication, ultrasound, or pulsed air. The signal may be pulsed or continuous. The radar transmission may either be pulsed or continuous.