125KHz RFID Coin Tag with Hole Uses EM format RFID signal:125Khz Non-contact reading Very durable (Over 20 years usage life) Completely waterproof, all-weather that can be used reliably in rainy, snowy, dusty, or other adverse environments Passive and no power required for operation.   SPECIFICATIONS of 125KHz RFID Coin Tag with Hole: Material ABS Shape Coin Diameter 30mm Frequency 125KHz Dimensions 11 x 9 x 5cms Weight 50 grams Click here to buy other types of RFID Tags: SKU: D-13 Category: RFID