125khz EM4100 TK4100 Wristband RFID Bracelet ID Safe Silicone RFID Band Read Only for Swimming Pool Field Operation

Closed-loop wristband, elastic, easy to wear, easy to use, waterproof, damp-proof, shock-proof, and high temperature resistance. Easy to carry, soft, comfortable to wear. No external power required. 125khz EM4100 TK4100 Wristband RFID Bracelet ID Safe Silicone RFID Band Read Only for Swimming Pool Field Operation Description: brand new and high quality Features: Closed-loop wristband, elastic, easy to wear, easy to use, waterproof, damp-proof, shock-proof, and high temperature resistance Easy to carry, soft, comfortable to wear No external power required Application: Widely used in swimming pools, cold storage, field operations and other extremely humid environments, even in the harsh conditions such as long-term immersion in water, can be used normally. Specifications: Material: Silicone Color: Green, Yellow, Blue Black Rose-Red(optional The yellow is a little smaller, but the bracelet is elastic and can be worn normally. Diameter: 65mm/0.21inch(approx. Length: 4.3cm/1.69inch(approx.