... , MODE function, Backlight can be adjusted.3. 6V 4Ah rechargeable battery backup,with dust cover.4. Capacity and division/parameter can be ... set.5. Power indication, Over load indication, Low Battery Indication6. Power in charge indication,7. Optional : a) RS232 ... Environment0~40 ,R.H.95% powerAC adaptor:9V/500mA, Rechargeable battery 6V4AH Net Weight3.15Kg Dimension/G.W.300mm×280mm110mm/15Kg ...