Seiko Alarm Clock KR886G Quartz with LED Light Used for several years, until about two years ago. Stored at home since then. I tested it for about 10 minutes. No problems, including the alarm. I will also include the new battery I put in during the test. Thank you for looking. There is no instruction manual, so the following is taken from the website. Size: Approximately 117 x 118 x 81mm Other features ● Electronic sound alarm ● Snooze ● Automatic lighting by light sensor (LED light) ● Sweep second hand ● Light-collecting resin dial ● Alarm auto-stop function (for about 5 minutes) Automatically lights up when it senses darkness Illuminates the dial evenly.