SECUREYE Smart Door Lock – S-HL30 Key Features Card Type: ID,TEMIC,MF1 Inductive distance: ≤ cm5 Power Supply: DC 6V 4pc of No.5 Alkaline Batteries Power Consumption: Static Current: ≤ 1A5 μ Card Reading Current: ≤ 2m0A Lock Opening Current: About 300 mA (last for 0.3s) Temperature: -20°C~+70°C Humidity: ≤ 95RH% Lack of Voltage Indication: When the voltage is < 4.8V,there will be a 3 sound and the red LED will light. Furthermore,the lock can still be opened for more than 50 times. Application: Hotels, Parking Lot, Residence Community,Office Entrance Guard and so on. Specialities: Output Guard, Water Proof And Moisture Proof, Tamper-proof Management Anti-static electricity: >15,000 V, it ensures information inside the lock not missing under the interference of strong static electricity. 1 Year Warranty