The PB-770 features an ECHO-exclusive vented back pad for user comfort in hot weather, a 63.3cc Power Boost Tornado engine that provides category-best power, an easy-to-reach tube-mount (PB-770T) or hip-mounted (PB-770H) throttle with cruise control, a side-mounted heavy-duty, dual-stage air filter for longer lasting engine, the Posi-Loc