... appropriate gap with dial and glass. 5.Checking the clock error:Put the dial to 3,6,9,12 respectively,then ... , If the clock rings are within 5 minutes,the clock error is normal. 6.Checking the alarm sound: Clear,resonant,no ... use. Quality level: 1.The month error is about 30 seconds 2.The clock error is about 5 minutes Instructions: 1.Battery ...