Pangao 800B31 upper arm: fully automatic measurement with Oscillometric method. * Who blood pressure classification indicator and Irregular heart rate detection. *Extra Large, Easy-To-Read lcd display With white or White Back-Light. (Lcd size: 63*82Mm). * live voice talking system with multi-Language in one device or single language For choice . * ( English,  Spanish,  Portuguese, german, french, Italian, greek, farsi, turkish,  Russian, Arabic, thai, vietnamese  And Multi-Language  Are  Available). * Clear Button and One-Touch operation for easy use. * 90 or 120 memories. * date and time Stamp. * Kpa / mmhg unit Exchanged. * automatic Switch-Off Function To save power. * approval: iso:13485: 2003,Ce0413, fda510K, Rohs, emc,Lvd. * power supply :Ac adapter (Ce,Ul) + batteries (4Aa*1.5V). * change battery indicator To replace battery. * warning Of operating errors. *Two User type or single user type for choice. * Average reading of latest three measurement result.