Advance Time Technology Solar-Powered LCD Alarm Clock, Black Solar-recharged alarm clock for environmentally smart way to wake up Hybrid solar technology extends battery life up to 5 years LCD readout with on-demand blue light, large numbers, 12/24 setting, and date Also with C/F temperature readout, 2nd time zone setting, and ascending alarm Measures 3 by 3 inches for compact footprint and convenient travel