Self-leveling mode & Manual mode Self-leveling Mode：When the pendulum is unlocked, the machine will power on and self-leveling mode will be enabled. The laser beam will beep and flash rapidly when the tool is ±4° out of self-leveling range. Manual Mode： Long Press the V button to enter manual mode, the laser tool can be placed at any angle for alignment. Burst Flash Mode After power on,long press the button "H" on the laser level to turn on the burst flash mode.Burst flash mode allows us to see the laser line more clearly.It can be used perfectly in brighter environments or work outside in the sun.Laser Level: Class II Two 5200mh Large-Capacity Lithium-ion Batteries The laser tool uses two 3.7V / 5200mAh high-capacity lithium-ion batteries which are about three times more than one 4000mAh lithium battery.Two 5200mh Large-Capacity Lithium-ion Batteries can ensure working for over 20 hours.4 battery indicators on the lithium-ion battery pack let the user know the current battery level and charge status. Removable Battery And Type-C Charging Port Type-c charging ensure faster charging speed. Low temperature operation The laser is capable of operating in cold weather down to -5 degrees Celsius and even down to -10 degrees Celsius.Especially in the cold winter, it can save you from unnecessary worries. More Installation Methods The internal threads on the laser level facilitate mounting to a tripod or laser mounting bar.The mounting threads on the bottom of the stand are designed to temporarily hold it in place or secure it to the tripod or laser mounting bar. Durable Design Takamine laser tool is completely covered with TPR soft rubber, providing a soft touch and enhanced protection.Waterproof/dustproof performance ensures you work well in hazardous working conditions. Tough, Drop-Resistant Window This laser level uses zinc alloy as the material for making the Window, which is hard, wear-resistant and impact-resistant, so you don't have to suffer from accidental faults. Bright Green Laser Diode This Takamine laser features a bright Japan SHARP green laser unit that is resistant to temperature changes and more stable.At the same power, the green laser is twice as bright as the red laser and has an operating range of up to 85 feet (300LUX) with accuracy to within ±1/9 inch at 33 feet.This product uses a high brightness chip and cannot be used with a receiver.The crystal laser requires a 5-minute warm-up period in low-temperature environments to restore the brightness of the light beam. It is unaffected in warm or high-temperature environments