Operating temp : 0~ 50C ( 32-122f) hum. 75% or less Power supply : NI - MH 4.8V Battery life time : 3hours without backlit/ 2hour backlit ON Display type : 320x240 LCD ( CCFL backlit) Dimensions : 164mm( W) x 58mm( D) x 256mm( H) Weight : 1 kg