brand new and high qualityIntroduction:T5577 card is a new one sensor cards , tuning frequency can be from 100kHz to 150 kHz, encryption, data for 330,64 ID, have aroused response function, and stable performance, the normal mode and E5550/E5551, and expand mode.As a typical low frequency, encryption, both cards, T5577 will has a great application prospect in the market. Features:Works excellent, epoxy resin encapsulation, ultrasonic welding, ensure product waterproof anti-throw.The pure copper wire coil, frequency stability, ensure that card read distance,in bad use environment also can work normally.Waterproof, anti-fall, corrosion resistance.Light and small, easy to carry.Widely used for access control, bus payment, parking lot management, identity authentication, attendance management, card payment, product identification, etc.Card only, other accessories demo in the picture are not included Specification:Material: PVCChip: T5577Working Frequency: 125KHZMemory Capacity: 330Bits, 10 Partitions, 8-digit PasswordReading and Writing Distance: 3-10cm(1.18-3.94in)Wiping Life: 100,000 TimesData Retention Time: 10 YearsColor:WhiteDiameter: 25mm/0.98inQuantity: 1 Set Note:1.No retail package.2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:10 Pcs x Card