Cartoon Rfid Keyfob 125khz Rewritable Blank Card With Em4305 T5577 Chip. Introducing the New 125kHz RFID Keyfob—an Advanced, Contactless ID Solution Featuring the T5577/EM4305 Chip, Designed for Seamless Integration into Your Security System. This Robust, Water-resistant Keyfob is Perfect for Environments Where Durability and Reliability Are Essential. Key Features: - Advanced Technology: Equipped with a T5577/EM4305 Chip for Effective Read and Rewrite Capabilities. - Frequency: Operates at a Standard 125kHz for Widespread Compatibility. - User-Friendly: Comes with a Key Ring for Convenient Carrying. - Water Resistant: Built to Withstand Water Exposure for Reliable, Long-term Use. - Customizable Data: This Blank Card Requires Data Writing Through a Replicator. If You Don't Have One, Simply Let Us Know when Ordering, and We'll Handle It for You. - Passive Power: No External Power Source Needed, Ensuring Effortless Operation. Ideal for a Variety of Proximity Access Applications, This RFID Keyfob is Both a Reliable and Durable Choice..