2-in-1 Combination Lock: Smart Digital RFID Password Lock with high sensitivity. Unlock using card key or password—quick and convenient. Electronic cabinet lock made of premium zinc alloy—durable, rust-resistant, and sturdy. Sleek, simple, and elegant design with high stability and enhanced security. Built-in alarm function: 4 long beeps indicate low battery. Long service life. Powered by 4 AA batteries (not included). Emergency power supply via USB port for unlocking. Widely applicable in schools, spas, saunas, swimming pools, gyms, cabinets, drawers, mailboxes, lockers, or any location where traditional keys are impractical. Color: P o Color. Material: Zinc alloy. Package Contents: 1 x Lock, 1 x Lock Catch, 1 x External Battery Case, 1 x Screw Pack, 1 x USB Cable, 1 x ID Card, 1 x English Manual. Note: Light reflection and display differences may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.