Card Tag, 1.Power: CR2325 battery, DC3V Card Tag, 1.Power: CR2325 battery, DC3V Dimensions:85mm×53mm×5mmColour: white Encapsulation: Ultrasonicns2.appearance protection: dust-proof, waterproof (ultrasound lamination)3.transmission distance: as far as 100 meters4.Battery Life :1-3 years (depending on transmitting frequency)