... automatically adjust the brightness. Its power less than 1.5 kW per month, no heat, no radiation, ... widely used in sports, workshops, public places, supermarket hall, large shopping malls, bus, warehouse, classroom, bus stations, train ... size(L*W*H)242*85*56mm/9.5*3.3*2.2inchPackage12pcsPacked byCarton boxPackage size(L ... H)320*90*56mm/12.6*3.5*2.2inch Digital Large Big Jumbo LED wall desk alarm with ...