Note: Our product has limited applicability and cannot match all types of RFID cards. Built-in buzzer and LED. The reading distance is 0-6 cm (0-2.4 inches). Compatible with 125KHz RFID cards. Supports EM4100 ID cards, 5200 cards, AWID cards, EM4305 cards, T5577 cards and some types of HID cards. Not compatible with 13.56MHz IC cards, UHF, UID cards, HID iClass, HID ProxCard II, or HID ProxKey III. Handheld shape design. Comfortable to hold and operates on 2 AAA batteries (batteries not included). Easy to use and carry. Widely used in homes, communities, schools, offices, hotels, elevators, and other locations requiring security monitoring or access control support. Color: Blue. Material: Plastic. Package Contents: 1 x RFID ID Writer, 10 x EM4305 Writable Card. Only the above package content is included; other products are not included. Note: Light and display differences may cause slight variations in color compared to the actual item. Measurement allows an error of +/- 1-3 cm.