With both Chinese and English menu; With background light; Can show the attenders' names and ID numbers; Can release common and private messages; 16 alarm clocks can be set for work days; Accurate time display; Can be used online and offline; Parameters can be set with keyboard while offline; Anti-static and power supply shocks resisitant design for all the output and input ports; Improved anti-interference performance；Can avoid system halting; Moistureproof and corrosion resistant PCB; Can work in all kinds of bad conditions;Working voltage: DC AC 8~25V; Power consumption: <3W; Data storage term: >10 years; Record capacity: 25, 000; Number of control cards: 2, 000; LCD resolution: 122 x 32 DOTS; Communication mode: RS485 x 1, Wiegand 26 interface x 2, relay output x 2, state input x 4; Card reading type: compatible with EM or Mifare; Sensing distance: 4~15cm; Online capacity: 255; Working temperature: -20~70'C; Operating humidity: 20%~90%; Storage temperature: -25~85'C