MultiTrack Target includes 7.4V Li-Ion battery Maintain target lock with confidence using Trimble Active Tracking technology and selecting from 8 different channels. This target can also work as a passive 360 prism. Target height - Trimble Standard - 135mm Prism Constant: +10mm Specs Angular Accuracy 5" Quantity Each Warranty 1 Year Measurement Range 800 Meters Brand Trimble