Parameter Static current;< 15µA Dynamic Current: 120 mA Store temperature: -20~85 Store Humidity: 10~85% RH Working temperature: 0~+60 working Humidity: 15~85% RH Working frequency: 13.56MHz (for MF 1) 4 pcs AA alkaline batteries usually last for 1 year Can memorize 1007 door opening records. Another 200 times for opening since the first low-power warming given out by the lock. Spare card can issue temporary guess card, which with 20 times opening function. Minimal reaction time: =100ms Applied to wooden or metal door of 38~75mm door thickness