Appearance: Stainless steel material, practical Advantage: High reliable, waterproof, antistatic, it is the most stable, economical and practical intelligent card lock which has a long working life. Disadvantage: The cost of TM card is high Static consumption: <5 (μA) Dynamic consumption: <300 (mA) Opening record: It can keep over 800 pieces of records Warning Voltage: <5 (V)