... is easy via 3key, free to select 12 or 24 Hour Model dispalythe LCD screen is big & clear " Di ... model,please press “SET” the key 1 time, then “hour” the position will glitter, press “ADJ” key and ... , then press “ADJ” the key and adjust minute digital,the last to press”SET” key to confirm the ... four groups to operate.b To press “SET” key, “Hour” position flash, press" ADJ” key and adjust number, then ...