This RFID card reader boasts high sensitivity, low operating current, and exceptional performance. It's widely applicable for various RFID applications like access control and attendance tracking. Features: 1. High sensitivity, low operating current, and high performance. 2. 125kHz RFID ID (EM4100) card reader with a USB interface. 3. Easy to use, simply plug and play. No driver downloads needed. 4. Broad application range, suitable for access control, attendance systems, security, and more. 5. Made from high-quality materials for lasting durability. Specifications: Supports: All 125Khz RFID EM4100 cards Frequency: 125Khz Working Voltage: 5V Operating Current: 100mA Card Reading Distance: 0~80MM Card Reading Time: <100MS Card Reading Speed: 0.2S Card Spacing: 0.5S Built-in Buzzer: Yes Communication Interface: USB interface, serial interface Charging Method: USB Working Temperature: 20 ℃~85 ℃ Material: Plastic Color: Black Size: Approx. 11 * 8 * 2.7cm / 4.3 * 3.1 * 1.1in Cable Length: 130cm / 4.3ft Weight: 125g Package List: 1 x RFID Reader 1 x USB Cable