... -loop wristband,elastic, easy to carry ,waterproof,moistureproof,shockproof,High temperature resistant2,Low frequency chip available(125KHz) :TK4100,EM4102,EM4200,T5577 ... -960MHZ) :UCODE GEN2,ALIEN H3,IMPINJ M4 ,etc 5,working temperature:-50°C~210°C6,application:widely used in swimming pool ...