1.Better than 1% accuracy 2. 0.2% of repeatability 3. 2¡Á10 English letters LCD display 4. Operate with clamp on transducers 5. Pipe diameters from 15mm to 6000mm 6. RS 485 interface 7.Built-in thermal printer 8. Ni-MH battery operation of over 24 h 9. 220VAC or 110VAC power supply