Leica TCR 1103 has 3" Angle accuracy, centralized dual axis compensator, RS232 Interface, Reflectorless (standard range): 80 m / 260, Range (average atmospheric conditions) with Round prism (GPR1): 3000m / 9,800 ft, PCMCIA card with 18000 files( 2 MB), easy to operate. A one time Re-calibration fee $150.00 applies.