The Viper probe droid, commonly referred to as the probot or Imperial probe droid, was a deep-space exploration and reconnaissance probe droid produced by Arakyd Industries. The Viper model was based on the success of Galalloy Industries' early probe droids. The design of the probot also relied heavily on the work of Viper Sensor Intelligence Systems, a corporation acquired by Arakyd during the Clone Wars. Though they were used almost exclusively by the military, they were considered class two exploration droids. The lightly-armored Viper droid measured 1.6 meters in height with five manipulator arms extending from a central pod and several retractable sensor arms for gathering samples. High resolution receivers and sensors covered the domed head - including motion, acoustic, sonic, and seismic sensors, a radiation meter, magnetic imager, and holocamera. It had an atmosphere sensor capable of determining a planet's atmosphere class within one half-hour. It moved on a repulsorlift generator which was equipped to operate over any terrain. One of the arms was high-torque, and the droid was equipped with a floodlight on its head. In addition, when making transmissions, the probe droid emitted a audio encrypted imperial computer code set of an unknown serial number. Information was relayed back to its superiors via a high-frequency HoloNet transceiver. Its repulsorlift engines carried the droid across terrain at up to 40 kmh, while the arms gathered samples. Vipers were delivered to their targets through single-use custom built hyperspace pods. They were commonly deployed along the perimeters of key strategic star systems and hyperlanes to act as automated guardians. Typically, a Viper probe droid cost 14,500 credits. They were capable of being deployed from Galactic Empire Command centers.