Protable Ultrasonic Easy Hand-Carry Xonic 100P, was designed for the field tests. Which has the batteries that could operate for 24 hours without charging. Also, it has the newest electronics and Clamp-On transducer to the best performance of the measurement. Specifications Clamp-On Transducers Single / Dual path Transit-Time AR(Anti-Round) Mode Accuracy ± 1.0 % single path ± 0.5 % dual path Magnetic Mounting Track Operating For More Than 24 Hours Only 2.4kg The Best Choice for Field Tests.