Hamar Laser’s R-1355 Wireless PDA Readout combines a Trimble Nomad PDA with a Zigbee® RF module operating at 2.4 GHz. The R-1355 Readout operates with Hamar Laser’s A-1519-2.4ZB and A-1520-2.4ZB radio wireless targets and any continuously rotating laser in our product line. The radios employ a frequency-hopping protocol to avoid interference with other radio devices that might be operating at the same frequency.