The Whisper installs microcable and its versatility saves you money. The Whisper uses compressed air to install the cable. The rollers, powered by most types of cordless drills (not included), control the microfiber as it is propelled into the microduct. An electronic monitoring system provides read-outs of speed and distance. The design of the Whisper provides for quick and easy component changes for different cable or duct sizes. Its compact size and portable maneuverability make the Whisper ideally suited for external or in-building use. The Whisper uses compressed air to install the cable. The rollers, powered by most types of cordless drills (not included), control the microfiber as it is propelled into the microduct. We suggest using a variable speed drill with an adjustable torque setting powered by an 18-20 volt battery. We further suggest a brush-less type drill manufactured by an industrial-grade manufacturer. An electronic monitoring system provides read-outs of speed and di