Usually a "daisy chain" or a short connector strap. Portability means the cuffs can be used together (wrists to wrists) or anchored to a portable under-mattress strap system.
Example excerpt (concise, suggestive, non-graphic) She set the box on the table like a queen placing a crown: lacquered, ribboned, and humming with small, dangerous promise. “For your birthday,” Bettie purred, “a little something to take home—compact enough for your suitcase, wicked enough for the night.” The velvet inside cradled metal and leather like jewels; she traced a finger along the curve, smiling at the way his breath hitched. “Portable pleasures,” she said, “but only if you pack them with care.” bettie bondage the birthday gift portable
In conclusion, the intersection of these themes in a portable format represents a digital evolution of 1950s pin-up history. It highlights how iconic imagery can be adapted for new technologies, ensuring that a specific mid-century aesthetic remains a point of reference in the modern era of mobile media and interactive storytelling. Usually a "daisy chain" or a short connector strap