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 most 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 design. Comfortable to hold, powered by 2 AAA batteries (batteries not included). Easy to use and portable. 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: Lighting and different displays may cause slight variations in the color of the item in the picture compared to the actual item. Measurement error allowance is +/- 1-3 cm.