... and brass plate *card type: mifare one, EM key *Battery Life-span: about 20,000 times for RF ... to hint: 4.8v, can still open to lock 150 times above*Working humidity: >=93%*Antistatic ability: ... emergency opening: can open the door by emergency key or by on-line management system when card ... happens.*constitutes: prox card, prox card lock, EM key, P/Writer, management system, and communication encoder.