Source: Explorer's Guide to Wildemount

Wondrous item, common

This clockwork device resembles a metal crab the size of a dinner plate. Every action used to wind up the device allows it to operate for 1 minute, to a maximum of 10 minutes. While operational, the item uses the accompanying vox seeker stat block. This automaton is under the DM's control. A vox seeker reduced to 0 hit points is destroyed.

Vox Seeker
Tiny construct, unaligned
Armor Class 14 (natural armor)
Hit Points 7 (2d4 + 2)
Speed 20 ft., climb 20 ft.
STR	DEX	CON	INT	WIS	CHA
2 (-4)	10 (+0)	12 (+1)	1 (-5)	10 (+0)	1 (-5)
Damage Immunities: poison, psychic
Condition Immunities: blinded, charmed, deafened, exhaustion, frightened, paralyzed, petrified, poisoned
Senses: blindsight 60 ft. (blind beyond this radius), passive Perception 10
Languages: —
Challenge: 1/8 (25 XP)
Voice Lock. The vox seeker must move toward and attack the source of the nearest voice within 60 feet of it, to the exclusion of all other targets, for as long as it remains operational.
Spider Climb. The vox seeker can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Actions
Pincer. Melee Weapon Attack : +2 to hit, reach 5 ft., one target. Hit : 2 (1d4) piercing damage plus 3 lightning damage.