The product name Smart cabinet lock Product model EM819 The front panel material Zinc alloy Front panel size 150*.7mm The color of the front panel Golden、Silver、Rose gold Working mode Swipe contactless The type of card "EM4100、T5577、mifare It is waterproof" The way the power is supplied Four or five alkaline batteries Voltage range Six V Emergency power supply Headphone jack Low-pr essure alarm Below 4.8V Battery life Normal continuous opening 600000times The size of the rear lock body 138*66*24mm The rear lock body material "304 stainless steel,ABS flame retardant plastic material" Rear lock body function Anti-pry function ,telescopic function Ambient temperature -Thirty℃~Sixty℃ Relative humidity Five%~Ninety-five% The door thickness is applicable Sixteen----Twenty-two mm Product warranty One-year warranty Packing list "One front panel、One rear lock body、 One door buckle box、Screw a pack、 One hand、A copy of the instruction manual One certiflcate of conformity "