... .Unique Voice alarm system 3.Available for any brand infusion sets. IV Infusion pump BYS-820 IV Infusion pump BYS-820 Features & ... , door open, bubbles in the tube, wrong setting, low battery, AC power pulled out etc.PowerAC100V~240V, 50/60Hz; Internal ... rechargeable Li battery, capacity≥1,600mAh, 4 hours internal battery backupOperation conditionsAmbient temperature: +5°C~+40° ...