... inventories,good performance, excellent prices,waterproof key,securi electronic locker lock with RFID key, zinc alloy(EM211) Material: zinc alloyKey: ... EM4100Weight: 150gFunction:1. Key is ID card/ EM41002. Set single and double cards, general card ... alkaline battery b. provide centralized power supply of small size lock body)Alarm voltage: < 4.6 VStatic power: < 1 ...