Ticking Gnomes

This metal cylinder smells at all times or burnished copper and a slight whiff of sulfur, and a rattling sound comes from inside if you shake it. This item has 3 charges. As an action, you can speak the command word and expend a charge to cause a small metal creature to pop out of the cylinder. This creature is a Tiny construct with an AC of 10 and 1 hit point. As a bonus action on your turn, you can command the construct to move up to 30 feet. If you don’t command the construct it does nothing, and takes no action to defend itself. At the end of your turn, the construct drops to 0 hit points unless you expend another charge from the item. When the construct is reduced to 0 hit points it explodes, dealing 2d6 fire damage to all creatures within 5 feet of the construct. This item regains 1d4-1 charges each day at dawn.