USA Seller, all locks are pre programmed. This RFID lock can be easily mounted inside of furniture drawers or cabinet doors unseen to the eye. Perfect for hidden compartments or shop displays and unlockable via the included user cards. RFID cards easily access the sensor through up to 1.5 of hardwood or glass. 4 AAA power the unit with a working battery life of up to 50,000 cycles. If battery life starts to get low, a low voltage alarm will sound to indicate a battery change is necessary. Total battery drainage will result in the lock being unable to lock ensuring you will never have a locked out situation. This lock as an AC port on the side of the body and can be used with an AC power adapter or Power Jack(not included). Each lock features spring releases that will give the drawer, cabinet etc. a push to open itself. Easy to follow setup instructions included will guide you to use the programming manager key to activate your user cards. No PC necessary to activate user cards! includes (2) RFID cards (Multiple locks can be set to open by the same user card. And multiple cards can open the same lock.) Ideal for cabinet drawers, shop displays, gym lockers. User manual included. Uses 4 AAA batteries (Not Included) One lock accepts up to 50 user keys. One user key can be set-up for multiple locks. NOTE: This RFID lock works at higher frequency - 13.56Mhz, common 125Khz RFID cards/fobs purchased from after market are not going to work with this lock. 1. Unlocking automatically after swiping card. 2. Low voltage alarm: when voltage is lower than 4.5V, lock will prompt with sound and light every opening. 3. High frequency card: Mi-fare 1, 13.56MHz. 4. Anti-force strength: 250kgs. 5. Longer sensing distance: maximum 40mm (1.57) 6. Support various material of door: metal, wooden, plastic etc. 7. There is long time unlocking alarm function. Press button 1 and button 2 simultaneously to enable/dis