This RFID hold can be easily interior of furniture drawers or cabinet doors unobserved to the eye. for buried compartments or shop displays and unlockable via the enclosed user cards / silicone wristband. RFID cards easily the sensor through up to 1.5 '' of hardwood or glass.Choose between four AAA batteries or a 5V power adapter to power the unit. Batteries a working battery life of up to 50,000 cycles. If battery life to get first gear, a first gear voltage alarm will enounce to indicate a battery change is requirement. add up battery drainage will in the confine being ineffectual to confine ensuring you will never have a locked impart situation. The 5V power jack can also a patronage power for an emergency confine impart situation. from each one confine spring releases that will give the drawer, cabinet etc. a push to yield itself. available to setup instructions enclosed will guide you to use the programming manager vandalise to activate your user cards/silicone wristband. A I card can be to yield secern locks. No requirement to activate user cards ! .