ultrasonic range finder ar851

general features & specifications
measuring range 0.5～60m 20inch~197feet
accuracy ±1%
measure in imperial/metric √
operation condition 0~40℃ 30~70%rh
laser pointer aiming selection √
low battery indication √
computer area and volume √
sum of length
auto/manual shut-off √
lcd backlight √
response time 2s
measuring benchmark setup √
single or double unit measure selection √
work frequency 40khz(single unit) 20khz(double unit)
key sound,beeps for wrong reading and reading confirmation √
general characteristics
power 9v alkaline battery(6f22)
lcd size 56*28.3mm
product color yellow+black
product net weight 315g
product size 150*75*46mm