... inventories,good performance, excellent prices,waterproof key,securi electronic locker lock with RFID key, zinc alloy(EM211) Material: zinc alloyKey: ... single and double cards, general card (unlock different locks)3. Testing tongue position (whether closes in place), tamperproof alarm ... alkaline battery b. provide centralized power supply of small size lock body)Alarm voltage: < 4.6 VStatic power: < ...