No device is perfect. The Ucast V461 has a few quirks:
For events that move through cellular "dead zones" (canyons, tunnels), the V461’s buffer memory and instant failover are life-saving. The rugged chassis survives handlebar mounts or chest rigs. ucast v461
for a short academic/technical paper on an unspecified topic, which you can adapt once the real subject is clarified: No device is perfect