A wearable stun device disguised as a chunky fashion bracelet, delivering a 75,000-volt discharge through electrode contacts on the outer surface when the wearer makes a fist and presses a concealed activation pad with their thumb. The SB-4 eliminates the primary weakness of handheld stun devices — fumbling for the device while under attack. Because it is already on the wearer's wrist, it is deployable in the same motion as a defensive push or palm strike.

VoltLine's design team included industrial fashion consultants who ensured the SB-4 looks like a statement accessory rather than a weapon. It is available in matte black, brushed silver, rose gold, and seasonal limited editions that consistently sell out. The exterior is a textured composite that conceals the electrode contacts until the device is activated, at which point the contacts extend 2mm from the surface — enough to penetrate thin fabric.

The SB-4 charges wirelessly on a standard induction pad and provides twenty discharges per charge. A subtle LED on the inner surface — visible only to the wearer — indicates charge level. The device has become particularly popular among young professionals in Tier 2-3 who commute through less secure areas and want protection that integrates into their daily wear without requiring a separate device to remember or carry.