Key Specifications/Special Features:Supported standard: ISO 15693-2, -3 Operating frequency (at +25 deg. C): 13.56MHz +/- 250KHz Typ. required activation field strength to read (at +25 deg. C): 112dBuA/m Typ. required activation field strength to read (at +25 deg. C): 115dBuA/m Factory programmed read only number: 64 bits Memory (user programmable) 2k bits organized in 64 x 32-bit blocks Typical programming cycles (at +25 degree C): 100,000 Data retention time (at +55 degrees Celsius): > 10 years Simultaneous identification of tags: up to 50 tags per second (reader/antenna dependent) Dimensions: LD201: dia.22 +/- 0.2mm x 3, +/- 0.2m LD25: dia.25 +/- 0.2mm x 3, +/- 0.2m LD22: dia.22 +/- 0.2mm x 3, +/- 0.2m LD20: dia. 20 +/- 0.2mm x 3, +/- 0.2m LD16: dia. 22 +/- 0.2mm x 3, +/- 0.2mThickness: LD201/LD25: 3.2mm LD22/LD20/LD16: 3mmHole: LD25: dia. 3mm LD22/LD20: dia. 2 x 2mm LD16: dia. 1.5 x 2mmCase material: nylon Protection class: IP 68 (condition: water pressure 45bar, 10h) Operating temperature: -25 to 90 degrees Celsius Storage temperature: -25 to 120 deg. C +150 deg. Celsiu for total 50 hours +200 deg Celsius for total 20 secondChemical resistance: typical chemicals used in laundry and dry-cleaning processes. And we can supported other chip EM, H4102, E5557, Hitag 1 or 2.