digital timer section display : 3 digit, 0.5" ht, red led range : 0-99.9 sec resolution : 0.1 sec time base : quartz crystal based oscillator. accuracy : 0.05% ± 1 count count mode : up-the timer starts counting up and stops and latches to the last reading when thermal cut out trips off. reset : manual digital ac voltmeter section display : 3 digit, 0.5" ht red led. range : 0-300 v ac resolution : 1 v ac accuracy : 0.5% ± 1 count dimensions : 220(w) x 70(h) x 180(d) mm3