Technical specilication Size240x180x45mm User capacity1500/2800 Transaction storage 50000/120000 Algorithm version 2005 version zk new algorithm Hardware platformzem100 Communications rs232 rs485(udp protocol) Identification time 2s Far 0.0001% Frr 1% Operating temperature 0-45 Operating humidity 20%-80% Back-up battery 2.5 hours Sensor zk sensor Language English simpified Chinese traditional Chinese other language