[Waterproof ABS Material] The RFID key tag is made of high-quality ABS material, the shell is strong and durable, has good waterproof, shockproof and anti-corrosion performance, so that you can better use it in your . After multiple processes, product quality can be guaranteed. The red and blue colors give you more choices.[Comes with A Portable Key Ring] Each tag is equipped with a key ring, which can be hung on and other items for easy use and avoiding loss. The volume of the key tag is 3.3x2.9x0.6cm, which is small in size and convenient to carry. It can be easily put in pockets and backpacks. -shaped appearance makes it better for daily use.[TK4100 Chip] The type of RFID sensor ID card chip is TK4100, working frequency: 125Khz, you can the appropriate access card according to your needs. Compatible with standard ID access devices or ID . Each chip has own ID, which is stored in the chip and printed on the back of the to security.[Read Only & Easy to Read] The chip is write- and cannot be programmedIt does not support and is not compatible with UHF and encrypted , such as , Radio, Cobra, , APCiK, Indala, Isonas, , , etc. The waterproof RFID key tag is suitable for 125KHZ card reader, and the reading distance is 0-10cm.[Good Helper for Access Control System] RFID key can be used in a of , suitable for access control, hotel locks, employee attendance, school campus visits, identity recognition, security , parking lot access, attendance , etc. It can be used in where an access control system is needed, such as offices, homes, schools, communities, etc.Support: Read Only, Not Writable.Working Frequency:125KHZsize:29x33x6mmMaterial:ABScolour:blue, redPackage Contents:50 x 125Khz RFID Card TagsOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm. Note: 1.Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 381 hours Hope you have a pleasant shopping experience!