Bare pen green stars laser pen the above quotation is, need 7 alkaline batteries and packaging plus an additional payment, thank you! No. 7 alkaline battery for 1 yuan, plus color package cloth box 2 yuan. Product specifications.
[size]: 13.5 x 1.8
[material]: []: 2*AAA copper
battery (two a better selection of 7 batteries, alkaline battery effect)
[color]: metal surface treatment / paint shell
[life]: continuous output, continuous service life of > 5000 hours
[405nm/ + 5nm
] output wavelength: [] output power: 10mW
(can be customized 10mW-50mW products, the greater the power range. Farther, more green light, green trace is coarse, the price will be higher
[range]): 1000 - 10000 meters
[]: spot shape / diameter circular light class
[control] linear circuit: APC line
[] [working voltage: DC=3.0V
working current: I&lt]; [280mA
] working temperature: +15 degrees C ~ 35
[] storage temperature: +10 degrees C ~ 40

tips : similar appearance this pen, there are three light source for oh. Respectively red light indicator, green light to indicate the, indicating blue violet . Way single indication function .

light brightness: green &gt ; red > violet (dark green and red light can see the beam. Blue purple look not to)

Stability of light : green &lt ; red = blue violet (green are greatly affected by climate, cooler environment and needs to warm up)

Light emitting effect