It has various chips inside , a long lifespan and it is water proof .

Product Description:

Key Specifications/Special Features:

Material: ABS Diameter: 20, 22, 28, and 30mm Thickness: 2.8 to 3.0mm Operating temperature: -20 to +60 degree Celsius Stockage temperature: -20 to +65 degree Celsius RFID IC available: 125KHz: EM Marin EM4102/4100, TK4100, Atmel T5567, and Hitag1/2 13.56MHz: ISO14443A: Mifare 1K/4K/ultralight (NXP) ISO15693: i code SLI , tag-it HF2048 Reading range: depending on RFID technology and reader design Customization supported:   Silk-screen printing: logo Laser engrave: logo Jet printing serial number Laser engrave serial number Applications:   Process control and factory automation Item identification

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