The DV-4 is a last-mile delivery automaton — a six-wheeled platform the size of a large cooler that navigates sidewalks and pedestrian areas to deliver packages from distribution centers to residences and businesses. It carries a single insulated cargo compartment rated for packages up to 30 kilograms, secured by a biometric lock that opens only for the designated recipient. The unit navigates using a combination of GPS, visual landmark recognition, and real-time pedestrian avoidance.

Ringo deploys thousands of DV-4 units across GLMZ, and they have become as much a part of the urban landscape as streetlights. They roll along sidewalks in steady streams during business hours, politely beeping to request right-of-way from pedestrians and queuing at crosswalks for traffic signals. They are earnest, unhurried, and universally ignored — the automation equivalent of pigeons. People step over them, walk around them, and occasionally kick them when frustrated. The DV-4 does not react. It has a delivery to make.

The DV-4's ubiquity makes it nearly invisible, which has made it a favorite platform for criminal repurposing. Modified DV-4 units carry contraband through public streets in plain sight — they look identical to legitimate units and follow the same navigation patterns. Law enforcement estimates that approximately three percent of DV-4 traffic in GLMZ at any given time consists of modified units carrying illegal cargo. Ringo's response has been to add tamper-evident seals to their units, which criminals duplicate within weeks of each new design.