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 cards. 13.56MHz IC card, UHF, UID card, iClass, ProxCard II, ProxKey III are not supported. Handheld shape design. Comfortable in hand, operates on 2 AAA batteries, easy to use and carry. (batteries not included) Widely used in homes, communities, schools, offices, hotels, elevators, and any other place that requires 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, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.