1. Notes: This device has limited applicability and cannot match all types of RFID cards. It is equipped with a buzzer and an LED indicator. The reading distance is 0 - 6 cm (0 - 2.4 inches), and it is suitable for 125KHz RFID cards. It supports EM4100 ID cards, 5200 cards, AWID cards, EM4305 cards, T5577 cards, and some types of HID cards. It does not support 13.56MHz IC cards, UHF cards, UID cards, HID iClass cards, HID ProxCard II cards, and HID ProxKey III cards. 2. It adopts a handheld shape design, providing a comfortable grip. It is powered by 3 AAA batteries (the batteries are not included in the package), making it easy to operate and carry. 3. It is widely used in families, communities, schools, offices, hotels, elevators, and any places that require security monitoring or access control support. 4. Color: Blue 5. Material: Plastic 6. Package contents: - 1 RFID identity writer - 10 EM4305 writable cards 7. Only the above package contents are included, and other products are not included. 8. Notes: Light and different displays may cause the color of the item in the picture to differ slightly from the actual color. The allowable measurement error is +/- 1 - 3 cm.