When the arm attaches it does provides a magical protection giving the wielder a +3 to AC. With this watch any creature that you meet that is of a different species then you, you may scan their dna and add it to the watch and as a bonus action you can transform into that species changing your stats.

Code Word 8900239003: Upon saying this code the watch detaches itself from the wearer ending attunement.

Code Word 01069004001002080906: Upon saying this code you can set a timer for anytime by saying Ti minus to set a time(example:  Ti minus 1 day, or 1 minute, or 1 month), Once a time is set the A.A.R.D will respond with "self destruct sequence engaged" the longer the timer the bigger the boom. 

Notes: Bonus: Unarmored Armor Class, Damage: Fire, The watch attaches to the arm and wont leave it unless you have been killed or you say the code word., Warding, Wristwear