Note: Limited applicability and cannot match all types of RFID cards. Built-in buzzer and LED. Reading distance is 0-6 cm (0-2.4 inches). Compatible with most 125KHz RFID cards. Supports EM4100 ID cards, 5200 cards, AWID cards, EM4305 cards, T5577 cards, and some types of cards. Does not support 13.56MHz IC cards, UHF, UID cards, iClass, ProxCard II, or ProxKey III. Handheld design. Comfortable to hold, powered by 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. Color: Blue Material: Plastic Package Contents: 1 x RFID ID Writer 10 x EM4305 Writable Card Only the items listed are included; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.