Schuler Scientific SE Rs232 interface connectivity. Easily connect your balance to a computer or printer via the Rs232 port Simple operation. Five dedicated keys (on/off, cal, unit & print) provide quick, effortless weighing Advanced microprocessor technology. The latest in electronic micro processing ensures the e-series balances provide fast, stable, reproducible weighing results Versatile. Operate the e-series on the bench top with standard ac power (adapter included). for field use or when moving from lab-to-lab, six aa batteries is all it takes