NEW GREEN DIODE TECHNOLOGY. We adopt Osram’s laser unit which is the best green laser unit in the world at present; Green laser is 2 times (300%) brighter than red laser with the same light source. Self-leveling mode & Manual mode. When the laser tool is switched to the unlocked position, self-leveling mode is enabled. The laser beam will blink continuously when the tool is beyond self-leveling range (4°±1°). When the pendulum locked, you can place the laser tool at any angle to project non-level straight lines. The laser beam will blink every 3-5 seconds to remind you that it’s not self-leveling now. Turn ON pulse mode: Pulse mode extends the working range up to farther, in brighter working conditions when using with Huepar Line Laser Receiver. When use with a receiver, it’s necessary to turn on the pulse mode. Note: The 9011G laser and the 9211G laser do not have a pulse mode. Items are in New Jersey USA and San Francisco USA. We will send you the nearest warehouse based on your location.