|* 1.2 inch super high brightness LED display, 5 digits.
* ∑－Δ ADC with super strong EMC characteristic and stability, devision selectable.
* 6V4Ah rechargeable battery inside with charging and low voltage protect circuit.
* Low power consumption, the battery can be used for 60 ~ 80 hours after recharging.
* Keyboard calibration with hardware lock.
* Easy to operate，option for wireless remote controller