Make sure batteries are inserted and test the keys before mounting. If the keys can't open, please read the manual and program the keys firstly & test. | What you get:1 x Lock , 1 x Hook,1xUSB Cable for Backup Power, 1 Set of Screws, 3 x RFID Tag(13.56 MHz M1), 3 x RFID Card(13.56 MHz M1). The batteries are not include, should buy separately.The Hook can be installed at vertically or horizontally | The thickness of cabinet wooden door should be not exceed 1.2", the card can work for 1.5" Max. | Hidden Cabinet Lock: no hole, just screws, ideal for wooden case | It's great for Liquid Cabinet Drawer Pantry Cam Baby Proof Gun Box Sliding Door