[Waterproof ABS material The RFID keychain is made of high quality ABS material, the shell is strong and durable, with good waterproof, shockproof and anti-corrosion properties, so that you can use it better in your daily life. After multiple processes, the quality of the product can be well guaranteed. Comes with a portable key ring. Each tag comes with a key ring that can be hung on keys and other items for easy access and to avoid their loss. The size of the key tag is 40*31.8*4mm, which is small and easy to carry. It can be easily carried in pockets and backpacks. The teardrop shape appearance makes it more suitable for daily use. Good helper for access control systemKey fob can be used in various places, suitable for access control, hotel door lock, staff attendance, campus visit, identification, security system, parking access, attendance system, etc. It can be used in places where access control system is needed, such as office, home, school, community, etc. The default password for the card is 12 F