Model AWK-105AL Analog Voltmeter Alarm ClockAfter a successfully funded Kickstarter last year, we're back with the Analog Voltmeter Alarm Clock. The AWK 105AL Alarm Clock vs. The AWK 105 The key differences between the AWK 105AL and the original AWK 105 are as follows. Alarm vs. No Alarm USB powered vs. Battery Powered Backlight Option vs. No Backlight AM PM indicator vs. no indicator ATTENTION: International Buyers The Clock is USB powered and ships with a North American style USB wall wart