A:AnswerYes. Choice of 4 one time alarms & one snooze alarm. Plus you can turn the hourly alarm on and off. Please refer to the owners manual here:https://support.casio.com/en/manual/manualsearch.php?cid=009&MODULE=3179
A:AnswerOn a full charge it will last 10 months in the dark
To recharge it just expose it to sunlight or bright light inside Sunlight charges it the fastest and there is a power indicator so you can see how full or empty the battery is
A:AnswerI have had my GW6900 for about 5 years and it has always just charged from wearing it outside in the sun. Great watch and I'm actually thinking of getting one for my son.